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VERSION:2.0
PRODID:-//SoPA UoE//Event Calendar//EN
X-WR-CALNAME:Particle Physics Theory Seminars
X-WR-CALDESC:Particle Physics Theory Seminars
X-PUBLISHED-TTL:PT12H
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/London
X-LIC-LOCATION:Europe/London
BEGIN:DAYLIGHT
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
DTSTART:19810329T010000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
TZNAME:BST
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
DTSTART:19961027T020000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
TZNAME:GMT
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85305@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250108T121426
LAST-MODIFIED:20250312T170557
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250416T123000
DTEND;TZID=Europe/London:20250416T143000
SUMMARY:1-2 pm: Sneaking up on lattice chiral fermions
DESCRIPTION:Title: Sneaking up on lattice chiral fermions\n\nAbstract: I
 t is widely believed that lattice theories cannot exhibit anomalies. I wil
 l give a counter example that refutes this folklore. The anomaly in questi
 on is a gravitational anomaly and involves a novel type of fermion - the K
 aehler-Dirac fermion. In flat space the Kaehler-Dirac equation describes f
 our degenerate Dirac fermions but this is no longer true in the presence o
 f gravity. The key advantages of the Kaehler-Dirac equation is that it may
  be discretized on arbitrary curved spaces without encountering fermion do
 ubling and while preserving a certain twisted $U(1)$ chiral symmetry.  In
  this way it does an end run around the Nielsen-Ninomiya theorem. In fact 
 not only is the symmetry retained upon discretization but so is a correspo
 nding mixed gravitational anomaly which breaks $U(1)\\to Z_4$. If one atte
 mpts to gauge this remaining $Z_4$ symmetry one discovers a mod 2 't Hooft
  anomaly which is only canceled for multiples of two Kaehler-Dirac fields.
  In flat space one can decompose this anomaly free model into spinors and 
 one finds the symmetries and matter representations of the Pati-Salam GUT 
 - a chiral gauge theory containing the Standard Model.  Since the free Ka
 ehler-Dirac equation in flat space can be mapped into staggered fermions t
 his suggests that it may be possible to give a non-perturbative definition
  of this chiral gauge theory in terms of a path integral over staggered fe
 rmions. I will discuss the remaining barriers to such a construction.\n\nS
 peaker:\n* Simon Catterall (Syracuse University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85305-1-2-pm-sneaking-up-on-lattic
 e-chiral-fermions
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85307@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250108T121757
LAST-MODIFIED:20250414T133920
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250423T123000
DTEND;TZID=Europe/London:20250423T143000
SUMMARY:1-2 pm: Global Aspects of 3-Form Fields in Axion Yang-Mills System
 s
DESCRIPTION:Title: Global Aspects of 3-Form Fields in Axion Yang-Mills Sy
 stems\n\nAbstract: Generalized symmetries have proved crucial for underst
 anding quantum fields. In this talk\, after introducing the importance of 
 axions in particle physics\, I highlight the role of higher-form symmetrie
 s within the axion Yang-Mills theory. This system exhibits an emergent 2-f
 orm symmetry\, which must be gauged to satisfy certain 't Hooft anomaly ma
 tching conditions. The resulting 3-form gauge theory provides a compelling
  description of the infrared (IR) dynamics of axion domain walls. It also 
 captures the interplay between the light axion and the heavier hadronic de
 grees of freedom.  Time permitting\, I will discuss how the global struct
 ure of the ultraviolet gauge group determines whether the system supports 
 an IR fractional quantum Hall state on the axion domain walls.\n\nSpeaker:
 \n* Mohamed Anber (Durham University)
LOCATION:Room 4325B\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85307-1-2-pm-global-aspects-of-3-f
 orm-fields-in-axion-yang-mills-systems
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85444@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250211T081304
LAST-MODIFIED:20250428T081600
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250501T123000
DTEND;TZID=Europe/London:20250501T143000
SUMMARY:1-2 pm: Spectral densities from Lattice Euclidean correlators
DESCRIPTION:Title: Spectral densities from Lattice Euclidean correlators\
 n\nAbstract: Spectral densities connect correlation functions computed in
  quantum field theory to observables measured in experiments. For strongly
 -interacting theories\, their non-perturbative determinations from lattice
  simulations are therefore of primary importance. They entail the inverse 
 Laplace transform of correlation functions calculated in Euclidean time. I
 n this talk I will describe a recent proposal for their definition and ext
 raction based on the Mellin transform\, both in the continuum and on the l
 attice\, with their corresponding generalization to smeared spectral densi
 ties\, together with possible outlooks.\n\nSpeaker:\n* Mattia Bruno (Unive
 rsità degli Studi di Milano-Bicocca)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85444-1-2-pm-spectral-densities-fr
 om-lattice-euclidean-correlators
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85314@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250108T194450
LAST-MODIFIED:20250505T092455
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250507T123000
DTEND;TZID=Europe/London:20250507T143000
SUMMARY:1-2 pm: Remodeling Feynman diagrams with chirality flow
DESCRIPTION:Title: Remodeling Feynman diagrams with chirality flow\n \n Ab
 stract: Since some 70 years\, the default method for calculating scatterin
 g amplitudes in collider experiments is to use Feynman diagrams. In this t
 alk\, I will explore how standard Feynman rules can be significantly simpl
 ified by breaking up the Lorentz structure of spin and momentum into small
 er objects\, the left and right spinors. Building on the spinor helicity f
 ormalism\, and adapting the method of color flow from the strong force\, I
  show how amplitudes corresponding to Feynman diagrams can be written down
  in a transparent and intuitive manner.\n\nSpeaker:\n* Malin Sjödahl (Lun
 d University)
LOCATION:Room 4325B\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85314-1-2-pm-remodeling-feynman-di
 agrams-with-chirality-flow
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85568@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250320T151938
LAST-MODIFIED:20250320T152023
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250512T123000
DTEND;TZID=Europe/London:20250512T143000
SUMMARY:1-2pm: θ-vacua and particle spectrum beyond perturbative electrow
 eak theory and General Relativity
DESCRIPTION:I will argue that in theories with a θ-vacuum structure and s
 pectral asymmetry of the Dirac operator\, the anomalous symmetry is realiz
 ed non-linearly.\n\nApplying this to General Relativity\, we conclude that
 : (i) the Einstein’s theory requires an expanded gauge structure based o
 n local supersymmetry\; (ii) even in the simplest such theory\, N=1 superg
 ravity\, supersymmetry is spontaneously broken by the gravitino condensate
 \, leading to a (pseudo)Goldstone supermultiplet consisting of the dilaton
 \, R-symmetry axion\, and goldstino.\n\nSimilarly\, the electroweak sector
  of the Standard Model must exhibit non-linearly realized anomalous B+L in
 variance\, accompanied by the (pseudo)Goldstone particle\, the electroweak
  ηw\, which can be viewed as the electroweak counterpart of the QCD η me
 son.\n\nSpeaker:\n* Archil Kobakhidze (University of Sydney)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85568-1-2pm-th-vacua-and-particle-
 spectrum-beyond-perturbative-electroweak-theory-and-general-relativity
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85311@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250108T122326
LAST-MODIFIED:20250517T154839
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20250521T123000
DTEND;TZID=Europe/London:20250521T143000
SUMMARY:[CANCELLED] Cancelled: 1-2 pm: TBA
DESCRIPTION:Title: TBA\n\nAbstract: TBA\n\nSpeaker:\n* Vladimir Kazakov (L
 aboratoire de Physique de l’Ecole Normale Supérieure)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85311-cancelled-1-2-pm-tba
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85312@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250108T122534
LAST-MODIFIED:20250523T130105
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250528T123000
DTEND;TZID=Europe/London:20250528T143000
SUMMARY:1-2 pm: Probing quantum gravity at all scales
DESCRIPTION:Title: Probing quantum gravity at all scales\n\nAbstract: To 
 make progress in our understanding of the quantum structure of spacetime\,
  we need observational tests of proposed theories of quantum gravity. Howe
 ver\, this is challenging\, because the Planck scale is many orders of mag
 nitude removed from scales that we can probe directly with observations. T
 hus\, we require lever arms that translate Planck-scale predictions into p
 redictions at observationally accessible scales. In my talk\, I will use a
 symptotically safe quantum gravity as a case study. I will show\, how the 
 interplay of quantum gravity with matter (both visible and “dark”) sha
 pes the properties of matter fields in and beyond the Standard Model at th
 e Planck scale. I will then show how to translate these Planck-scale predi
 ctions into predictions of Standard-Model properties as well as prediction
 s about the properties of the dark matter and the dark energy.\n\nSpeaker:
 \n* Astrid Eichhorn (Universität Heidelberg)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85312-1-2-pm-probing-quantum-gravi
 ty-at-all-scales
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85728@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250517T153743
LAST-MODIFIED:20250530T163100
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250604T123000
DTEND;TZID=Europe/London:20250604T143000
SUMMARY:1-2 pm: Uplifting Massive Graphs from Minkowski to de Sitter
DESCRIPTION:Title: Uplifting Massive Graphs from Minkowski to de Sitter\n\
 nAbstract: Identifying useful flat-space limits of cosmological correlator
 s—defined on the future boundary of de Sitter space—is challenging due
  to their inherent scale invariance. In this talk\, I present a massive 
 flat-space limit in which cosmological correlators arising from the exchan
 ge of heavy fields can be expressed in terms of massive Feynman diagrams
  in Minkowski space. As a phenomenological application\, I use this limit 
 to compute the imprints of massive particles during inflation on primord
 ial non-Gaussianity. These results offer new channels for discovering infl
 ation-era particles with the next generation of CMB and large-scale struct
 ure surveys\, such as Simons Observatory and SPHEREx.\n\nSpeaker:\n* Sadra
  Jazayeri (Imperial College London)
LOCATION:Room 6201\, JCMB\, King's Buildings
URL:https://www.ph.ed.ac.uk/events/2025/85728-1-2-pm-uplifting-massive-gra
 phs-from-minkowski-to-de-sitter
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85682@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250424T164419
LAST-MODIFIED:20250613T082911
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250617T133000
DTEND;TZID=Europe/London:20250617T153000
SUMMARY:2-3 pm: Hamiltonian Truncation and Effective Field Theory
DESCRIPTION:Title: Hamiltonian Truncation and Effective Field Theory
 \n\nAbstract: Hamiltonian truncation is a non-perturbative numerical me
 thod\, complementary to the lattice\, for calculating observables of a qua
 ntum field theory by truncating the Hilbert space to states with energy
  below a maximum energy cutoff. In this talk I will provide an overview of
  effective field theory techniques and discuss how they can be applied
  to Hamiltonian truncation calculations. This effective field theory
  approach provides a systematic way of improving the accuracy of calcula
 tions without increasing the computational cost. I will demonstrate this i
 n detail with numerical results in 2d phi^4 theory\, and talk about ongoin
 g and future applications of this method to more complicated theories. \n
 \nSpeaker:\n* Kara Farnsworth (University of Geneva)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85682-2-3-pm-hamiltonian-truncatio
 n-and-effective-field-theory
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85705@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250502T100007
LAST-MODIFIED:20250615T154000
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250618T123000
DTEND;TZID=Europe/London:20250618T143000
SUMMARY:1-2 pm: Standard Model Symmetries and K(E10)
DESCRIPTION:Title: Standard Model Symmetries and K(E10)\n\nAbstract: In 
 this talk I will explain how to amend a scheme originally proposed by M. G
 ell-Mann to identify the three families of quarks and leptons of the Stand
 ard Model with the 48 spin-1/2 fermions of N=8 supergravity that remain af
 ter absorption of eight Goldstinos\, a scheme that in its original form is
  dynamically realized at the SU(3) X U(1) stationary point of gauged N=8 s
 upergravity. I will show how to deform and enlarge this symmetry at the ki
 nematical level to the full Standard Model symmetries. This symmetry enhan
 cement is achieved by embedding the Standard Model symmetries into (a quot
 ient group of) K(E10)\, the `maximal compact subgroup' of the maximal rank
  hyperbolic Kac-Moody symmetry E10\, and an infinite prolongation of the S
 U(8) R-symmetry of N=8 supergravity. This scheme\, which also aims to enco
 mpass quantum gravity\, cannot be realized within the framework of space-t
 ime based (quantum) field theory\, but requires space-time and related geo
 metrical concepts to be `emergent'. The main hypotheses on which our const
 ruction hinges\, and the remaining open issues will be critically reviewed
 .\n\nSpeaker:\n* Hermann Nicolai (Max Planck Institute for Gravitational P
 hysics (Albert-Einstein Institute))
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85705-1-2-pm-standard-model-symmet
 ries-and-ke10
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85462@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250218T092700
LAST-MODIFIED:20250623T144212
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250626T143000
DTEND;TZID=Europe/London:20250626T163000
SUMMARY:3-4 pm: A journey through the jungle of thermal dark matter models
DESCRIPTION:Title: A journey through the jungle of thermal dark matter mod
 els\n \n Abstract: To account for the evidence that 26% of the Universe is
  made up of dark matter\, several general explanations have been proposed.
  The simplest mechanism relies on the existence of a new stable particle t
 hat would have been in thermal equilibrium with the Standard Model primord
 ial plasma shortly after the Big Bang\, and would have subsequently decoup
 led from it in a Boltzmann suppressed manner. There are many possible ther
 mal dark matter models of this kind. One way to distinguish them is by how
  they account for its stability on cosmological time scales. This seminar 
 is a journey through thermal dark matter models and their stabilization me
 chanisms. It is often said that recent experimental results have cast ther
 mal dark matter models into crisis. This journey will also address this qu
 estion.\n\nSpeaker:\n* Thomas Hambye (Brussels University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, James Clerk Maxwell Build
 ing (JCMB)
URL:https://www.ph.ed.ac.uk/events/2025/85462-3-4-pm-a-journey-through-the
 -jungle-of-thermal-dark-matter-models
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85832@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250620T095829
LAST-MODIFIED:20250715T093925
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250702T123000
DTEND;TZID=Europe/London:20250702T143000
SUMMARY:1-2pm: Extracting the Expansion History from Small-scale Structure
DESCRIPTION:Since the growth of dark matter density perturbations depends 
 on the expansion rate\, deviations from the standard expansion history lea
 ve imprints on the matter power spectrum.  I will discuss how adding deca
 ying massive particles or fast-rolling scalar fields to the standard cosmo
 logical model impacts the abundance and structure of dark matter halos. In
 troducing these components prior to the onset of Big Bang nucleosynthesis 
 (BBN) can enhance structure growth on very small scales\, leading to new c
 onstraints on annihilating dark matter. Meanwhile\, scalar fields that dom
 inate the universe after BBN can enhance the population of dwarf galaxies 
 while suppressing power on intermediate scales. Both cases illustrate how 
 small-scale structure provides a powerful probe of the evolution of the un
 iverse prior to recombination.\n\nSpeaker:\n* Adrienne Erickcek (Universit
 y of North Carolina)
LOCATION:Room 4325B\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85832-1-2pm-extracting-the-expansi
 on-history-from-small-scale-structure
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85862@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250710T082946
LAST-MODIFIED:20250830T101349
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250902T153000
DTEND;TZID=Europe/London:20250902T173000
SUMMARY:4pm - 5pm: A Superalgebra Within:  representations of lightest st
 andard model particles form a Z_2^5-graded algebra
DESCRIPTION:It is demonstrated how a set of particle representations\, fam
 iliar from the Standard Model\, collectively form a superalgebra.  Those 
 representations mirroring the behaviour of the Standard Model's gauge boso
 ns\, and three generations of fermions\, are each included in this algebra
 \, with exception only to those irreps involving the top quark.  This sup
 eralgebra is isomorphic to the Euclidean Jordan algebra of $16\\times 16$ 
 hermitian matrices\, $H_{16}(\\mathbb{C})\,$ and is generated by division 
 algebras.  The division algebraic substructure \n\n(1)  enables a natur
 al factorization between internal and spacetime symmetries\, and   \n\n(
 2)  allows for the definition of a  $\\mathbb{Z}_2^5$ grading on the alg
 ebra.  \n\nThose internal symmetries respecting this substructure are fo
 und to be $\\mathfrak{su}(3)_C \\oplus \\mathfrak{su}(2)_L \\oplus \\mathf
 rak{u}(1)_Y\,$ in addition to four iterations of $\\mathfrak{u}(1)$.  For
  spatial symmetries\, one finds multiple copies of  $\\mathfrak{so}(3)$.
   Given its Jordan algebraic foundation\, and its \\it apparent \\rm non-
 relativistic character\, the model may supply a bridge between particle ph
 ysics and quantum computing.\n This talk is intended to be accessible to s
 tudents.  Everyone is welcome.\n\nSpeaker:\n* Nichol Furey (Humboldt Univ
 ersity)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85862-4pm-5pm-a-superalgebra-withi
 n-representations-of-lightest-standard-model-particles-form-a-z25-graded
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85864@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250710T083550
LAST-MODIFIED:20250904T095726
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250910T123000
DTEND;TZID=Europe/London:20250910T133000
SUMMARY:1pm - 2pm: Differential Equations for Energy Correlators in Any An
 gle
DESCRIPTION:Energy Correlators (EC) are the simplest IR finite observables
  that measure the distribution and the correlation of energy flow in a p
 articular direction\, which connect theories and experiments. \n\nFrom a
  phenomenological aspect\, they can be used as event shape or jet structu
 res to further study properties of Quantum Chromodynamics (QCD) or even n
 ew physics. I will introduce a systematic algorithm to calculate the
  canonical differential equations for energy correlators at generic angle 
 in N = 4 super Yang-Mills theory. Applying the algorithm\, we obtain the 
 canonical basis for three-point EC and the full set of master integrals f
 or four-point EC. For four-point EC\, based on differential equations\, 
 we find two elliptic curves and one genus 2 hyperelliptic curve by Picard-
 Fuchs operators.\n\nSpeaker:\n* Rourou Ma (Max-Planck Institute)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85864-1pm-2pm-differential-equatio
 ns-for-energy-correlators-in-any-angle
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85896@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250714T094853
LAST-MODIFIED:20250911T092326
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20250917T123000
DTEND;TZID=Europe/London:20250917T140000
SUMMARY:1pm-2pm: Black holes and false vacuum decay
DESCRIPTION:It is a common wisdom that impurities and inhomogeneities can 
 accelerate first-order phase transitions and false vacuum decay. Black hol
 e is an interesting example of spatial "impurity" and a source of quantum 
 Hawking radiation. It is important to calculate accurately how black holes
  catalyse the decay of a metastable state\, since our current\, low-energy
  vacuum of the Standard Model is itself metastable\, and since many cosmol
 ogical models predict abundant production of small\, hot primordial black 
 holes. The challenge is that an evaporating black hole is not in thermal e
 quilibrium with its environment\, and standard Euclidean methods of calcul
 ating the decay rate are not justified. I will discuss progress made in ca
 lculating black hole induced vacuum decay from different initial states us
 ing toy models of dilaton black holes in two dimensions. In particular\, I
  will show that the non-equilibrium initial state decays exponentially slo
 wer than the equilibrium one and its decay rate is exponentially suppresse
 d at all black hole temperatures. This is expected to be true in four dime
 nsions as well\, and the precise suppression factor remains to be calculat
 ed.\n\nSpeaker:\n* Andrey Shkerin (Perimeter Institute)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85896-1pm-2pm-black-holes-and-fals
 e-vacuum-decay
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85866@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250710T083724
LAST-MODIFIED:20250922T214019
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251001T123000
DTEND;TZID=Europe/London:20251001T143000
SUMMARY:1pm - 2pm: Determining the Structure of the Pion from Lattice QCD
DESCRIPTION:We investigate the hadronic structure of the pion utilising th
 e Feynman-Hellmann (FH) theorem. The Compton amplitude of the pion is diff
 icult to evaluate due the systems susceptibility to noise when boosted to 
 higher momenta. To overcome this\, we employ the noise reduction technique
 s of momentum smearing and all-mode averaging. As an initial test of these
  techniques\, they are first applied to elastic scattering. This allows th
 e form factor of the pion to be determined at a higher momentum transfer t
 hen previously achieved utilising the FH theorem. We also present recent p
 rogress investigating the Gross-Llewellyn Smith (GLS) sum rule for the pio
 n.\n\nSpeaker:\n* Jordan McKee (Adelaide University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85866-1pm-2pm-determining-the-stru
 cture-of-the-pion-from-lattice-qcd
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86011@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250825T144754
LAST-MODIFIED:20251002T081110
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251006T123000
DTEND;TZID=Europe/London:20251006T143000
SUMMARY:1pm - 2pm: Quarkonia Production in Modified NRQCD
DESCRIPTION:Non-Relativistic QCD (NRQCD) has been used with considerable s
 uccess for understanding charmonium production and decays but the true tes
 ts of NRQCD -- the parameter-free predictions that rely on the heavy-qua
 rk symmetry of the NRQCD Lagrangian viz.\, the polarisation of J/psi and
  psi' and the prediction of the eta_c cross section -- fail miserably to c
 onform with experiment. This has provoked us to propose a modification of 
 NQRCD where we invoke soft\, perturbative gluon emission from the intermed
 iate colour-octet c c(bar) states. This model is able to i) provide very g
 ood fits to Tevatron data on J/psi\, psi' and chi production\, ii) provide
  parameter-free predictions for J/psi\, psi' and chi production which are 
 in excellent agreement with the data from LHC\, and iii) provide a complet
 e resolution of the LHCb eta_c anomaly. Results on bottomonium production 
 at the LHC and on quarkonium production in nucleus-nucleus collisions will
  also be presented.\n\nSpeaker:\n* Krishnamoorthy Sridhar (Azim Prenji Uni
 versity\, Bengaluru)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86011-1pm-2pm-quarkonia-production
 -in-modified-nrqcd
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85925@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250724T110436
LAST-MODIFIED:20250929T104147
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251008T123000
DTEND;TZID=Europe/London:20251008T143000
SUMMARY:1pm-2pm: Flavour physics at the precision frontier
DESCRIPTION:Flavour physics provides an excellent framework for indirect 
 searches for physics beyond the Standard Model. Such searches require both
  high-precision experimental measurements and equally precise theoretical 
 predictions. In this talk\, I will focus on the theoretical side of b->sll
  transitions\, which poses significant challenges due to the non-perturbat
 ive nature of low-energy QCD effects. I will also discuss current strategi
 es for overcoming these challenges and outline future prospects in the fie
 ld.\n\nSpeaker:\n* Nico Gubernari (University of Cambridge)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85925-1pm-2pm-flavour-physics-at-t
 he-precision-frontier
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85927@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250724T173632
LAST-MODIFIED:20251006T201506
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251015T123000
DTEND;TZID=Europe/London:20251015T143000
SUMMARY:1pm-2pm: Can SMEFT discover New Physics?
DESCRIPTION:The Standard Model Effective Field Theory (SMEFT) provides a s
 ystematic\, model-independent extension of the Standard Model through high
 er-dimensional operators\, enabling collider data to be interpreted in the
  presence of heavy new physics. In recent years\, global SMEFT analyses ha
 ve achieved substantial progress in constraining the parameter space\, yet
  their discovery potential remains limited by the problem’s high dimensi
 onality and by the requirement to fit all operators simultaneously. In thi
 s talk\, I will present a novel strategy that re-casts SMEFT fits into an 
 optimised\, discovery-oriented framework. The approach combines Bayesian m
 odel selection with genetic algorithms to efficiently navigate the space o
 f operator subsets\, identifying deformations that improve agreement with 
 data while minimising model complexity. I will demonstrate the method usin
 g current LHC and LEP measurements as well as future collider projections\
 , and validate its performance through closure tests with injected UV sign
 als. The results show that SMEFT\, when equipped with model-selection tech
 niques\, can act as a genuine discovery tool\, pointing to the regions of 
 parameter space where indirect signs of new physics are most likely to eme
 rge.\n\nSpeaker:\n* Luca Mantani (Valencia University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85927-1pm-2pm-can-smeft-discover-n
 ew-physics
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86159@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250923T135142
LAST-MODIFIED:20251017T140708
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251022T123000
DTEND;TZID=Europe/London:20251022T143000
SUMMARY:1pm - 2pm: Multiloop amplitudes for four-particle scattering with 
 one off-shell leg
DESCRIPTION:Multiloop and multileg scattering amplitudes are key ingredien
 ts for achieving higher theoretical precision ahead of the high-luminosity
  run of the LHC. In this talk\, I will present recent results on three-loo
 p Feynman integrals and amplitudes for vector boson + jet and Higgs + jet 
 production in the heavy-top-mass limit at hadron colliders. I will also di
 scuss the computational advances underlying these calculations\, including
  the derivation of a minimal tensor basis\, the identification of canonica
 l master integrals\, and the construction of a graded basis of transcenden
 tal functions tailored to specific scattering processes.\n\nSpeaker:\n* Pe
 tr Jakubcik (University of Oxford)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86159-1pm-2pm-multiloop-amplitudes
 -for-four-particle-scattering-with-one-off-shell-leg
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85914@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250723T103351
LAST-MODIFIED:20251020T111715
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251029T123000
DTEND;TZID=Europe/London:20251029T143000
SUMMARY:1pm - 2pm: The Signal to Noise problem and Stochastic Automatic Di
 fferentiation
DESCRIPTION:Lattice field theory allows for the direct computation of phys
 ical quantities in strongly coupled theories. In particular\, numerical Mo
 nte Carlo simulations using Euclidean correlation functions give direct ac
 cess to the energy spectrum of the theory.  However\, the fast degradatio
 n of the signal with the Euclidean time\, known as the signal to noise pro
 blem\, significantly affects the precision of such computations.  After i
 ntroducing the topic and expressing the Euclidean correlators as derivativ
 es with respect to sources in the action\, a potential solution to the pro
 blem will be presented.  This approach involves the concept of Automatic 
 Differentiation\, which requires\n an extension to stochastic processes\, 
 in particular for its use in Monte Carlo simulations.  Results will be sh
 own in a four-dimensional scalar theory.\n\nSpeaker:\n* Guilherme Catumba 
 (Milan Bicocca University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85914-1pm-2pm-the-signal-to-noise-
 problem-and-stochastic-automatic-differentiation
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86104@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250905T132942
LAST-MODIFIED:20251028T111215
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251105T123000
DTEND;TZID=Europe/London:20251105T143000
SUMMARY:1pm-2pm: (A)dS Double Copy in Twistor Space
DESCRIPTION:The double copy\, which relates gravity to the square of Yang
 –Mills theory\, is usually studied in flat spacetime and is known to hol
 d both for scattering amplitudes and for classical field configurations. I
 n this talk\, I will present a new approach to extending these results to 
 maximally symmetric curved spacetimes. The new relations are formulated in
  twistor space\, a complex projective space that encodes solutions to the 
 equations of motion as holomorphic data. First\, I will discuss the case o
 f AdS₃\, where a double copy structure for bulk to boundary correlators 
 and black hole solutions naturally arises in minitwistor space. Then\, I w
 ill show how in (A)dS₄ one can construct bulk correlation functions usin
 g only twistors\, dual twistors\, and the infinity twistor as building blo
 cks. The relation to coordinate space arises via nested Penrose tranforms.
  The boundary limit of these correlators yields CFT correlators that satis
 fy the expected Ward identities and obey a simple double copy relation.\n\
 nSpeaker:\n* Mariana Carrillo Gonzalez (Imperial College)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86104-1pm-2pm-ads-double-copy-in-t
 wistor-space
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86149@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250922T214212
LAST-MODIFIED:20251110T190555
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251112T123000
DTEND;TZID=Europe/London:20251112T143000
SUMMARY:1pm-2pm: Tropical quantum field theory and asymptotics of perturba
 tion theory
DESCRIPTION:To compute predictions for phase transitions in condensed matt
 er or the collision of elementary particles\, quantum field theory is typi
 cally solved perturbatively. This expansion produces divergent series\, so
  the extraction of meaningful results is non-trivial (resummation)\; moreo
 ver very little is known about the actual asymptotic behaviour of these se
 ries.\n In this talk\, I will introduce a new limit of quantum field theor
 y (the „tropical“ limit)\, which is easily computable to very high ord
 ers in perturbation theory\, yet at the same time captures the full comple
 xity of subdivergences and renormalization. I will illustrate that the val
 ues of Feynman integrals and their tropical limit are highly correlated. B
 ased on data up to 200 loops\, we can precisely determine the asymptotic g
 rowth of the (tropical) beta function and confirm the absence of renormalo
 ns in the minimal subtraction scheme.\n\nSpeaker:\n* Erik Panzer (Oxford U
 niversity)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86149-1pm-2pm-tropical-quantum-fie
 ld-theory-and-asymptotics-of-perturbation-theory
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-85936@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250729T094604
LAST-MODIFIED:20251110T092405
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251119T123000
DTEND;TZID=Europe/London:20251119T143000
SUMMARY:1pm-2pm: Hadronic vacuum polarization to three loops in chiral per
 turbation theory
DESCRIPTION:In this talk we will report on the analytic evaluation of the 
 hadronic vacuum  polarisation   in two-flavor chiral perturbation theor
 y to three  loops [arXiv:2510.12885] that's relevant for the calculation 
 of   the anomalous magnetic moment of the muon and electron. The three-l
 oop amplitude gets contributions from polylogarithms and six elliptic mast
 er integrals\, all derivable from the single-mass two-point sunset integra
 l via differentiation or integration. Our result is intended to serve as a
  starting point for phenomenological studies\, as well as the computation 
 of finite-volume corrections in lattice QCD.\n \n Based on work in progres
 s with Laurent Lellouch\, Alessandro Lupo\, Mattias Sjö and Kálmán Szab
 o\n\nSpeaker:\n* Pierre Vanhove (IPhT Saclay)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/85936-1pm-2pm-hadronic-vacuum-pola
 rization-to-three-loops-in-chiral-perturbation-theory
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86099@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250904T163911
LAST-MODIFIED:20251124T103336
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251203T123000
DTEND;TZID=Europe/London:20251203T143000
SUMMARY:1pm-2pm: Bayesian Analysis and Analytic Continuation of Scattering
  Amplitudes from Lattice QCD
DESCRIPTION:We present a novel procedure for analyzing the lattice-QCD spe
 ctrum via the finite-volume formalism to obtain constraints on multi-hadro
 n scattering amplitudes at both real and complex energies. This approach c
 ombines a Bayesian reconstruction of the scattering amplitude on the real 
 axis with Nevanlinna interpolation for analytic continuation to complex-va
 lued energies. The method is non-parametric\, inherently accounting for pa
 rametrization dependence within the uncertainty. We demonstrate the applic
 ability of this approach using real lattice-QCD data in resonant systems f
 rom the HadSpec and BaSc collaborations.\n\nSpeaker:\n* Miguel Salg (Uni B
 ern)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86099-1pm-2pm-bayesian-analysis-an
 d-analytic-continuation-of-scattering-amplitudes-from-lattice-qcd
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86153@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250922T214446
LAST-MODIFIED:20251202T134750
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251210T103000
DTEND;TZID=Europe/London:20251210T123000
SUMMARY:11am - 12pm: Infrared singularities and the collinear limits of mu
 lti-leg scattering amplitudes
DESCRIPTION:Scattering amplitudes are expected to admit a factorised struc
 ture in special kinematic limits\, such as the Regge\, soft and collinear 
 limits. However\, less is known about the precise mechanisms through which
  factorisation of n-particle scattering amplitudes is realised at high per
 turbative orders\, where more complex structures arise. Starting with the 
 soft anomalous dimension\, in this talk I will discuss the multi-particle 
 collinear limits of massless amplitudes at three- and four-loop orders. In
  particular\, I will demonstrate how strict collinear factorisation of mul
 tiple massless final-state coloured particles is achieved\, and show that 
 the conditions on the structure of the soft anomalous dimension required b
 y two-particle collinear limits are sufficient to guarantee factorisation 
 also in any multiple collinear limit. I will also discuss new constraints 
 on the soft anomalous dimension that arise from multi-collinear limits for
  amplitudes containing massive coloured particles.\n\nSpeaker:\n* Sebastia
 n Jaskiewicz (University of Bern)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86153-11am-12pm-infrared-singulari
 ties-and-the-collinear-limits-of-multi-leg-scattering-amplitudes
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86151@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250922T214323
LAST-MODIFIED:20251212T153225
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251215T153000
DTEND;TZID=Europe/London:20251215T173000
SUMMARY:4pm - 5pm: Semiclassics for composite operators
DESCRIPTION:I will present a semiclassical framework to determine the scal
 ing dimensions of composite operators in conformal and quantum field theor
 ies. As a main example I will focus on the λϕ^4 theory and show how to 
 obtain the full spectrum of composite operators built out of n fields tr
 ansforming in the traceless-symmetric Lorentz representations to the next-
 to-leading order in the double-scaling limit  n→∞\, λ→0 with 
 λn fixed. At any given order the semiclassical expansion resums an infin
 ite number of Feynman diagrams providing a systematic path to predict hi
 gher order terms in the traditional perturbative loop expansion.\n\nSpeake
 r:\n* Oleg Antipin (Rudjer Boskovic Institute)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86151-4pm-5pm-semiclassics-for-com
 posite-operators
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86013@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20250825T160532
LAST-MODIFIED:20251217T094646
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20251217T123000
DTEND;TZID=Europe/London:20251217T143000
SUMMARY:1pm - 2pm: Conventional and exotic mesons from functional methods
DESCRIPTION:We summarise recent theoretical results on the spectrum and pr
 operties of zero\, two\, and four-quark states obtained from functional Q
 CD using Dyson-Schwinger and Bethe-Salpeter equations. We discuss the spe
 ctrum of glueballs in Yang-Mills theory and prospects to study their prope
 rties in QCD. We discuss the effects of dynamical chiral symmetry breakin
 g on the spectrum of scalar mesons and address the flavour dependence and
  the internal structure of four-quark states with open and hidden charm a
 nd bottom content.\n\nSpeaker:\n* Christian Fischer (Giessen University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2025/86013-1pm-2pm-conventional-and-exo
 tic-mesons-from-functional-methods
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86710@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20251203T165138
LAST-MODIFIED:20260106T134140
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260114T123000
DTEND;TZID=Europe/London:20260114T143000
SUMMARY:1pm - 2pm: How strong exactly is the strong nuclear force?
DESCRIPTION:At the fundamental level the strong nuclear force is described
  by QCD\, the theory of quarks and gluons and their interactions. The stre
 ngth of their coupling\, alpha_s(m_Z)\, is one of the least precisely know
 n fundamental parameters of the Standard Model. This is due to confinement
  and the resulting impossibility to carry out experiments on free quarks a
 nd gluons. While the Standard Model should be enough to describe experimen
 ts involving the strong interactions\, phenomenological approaches often r
 ely on additional assumptions\, such as models for hadronization\,  or "q
 uark hadron duality''.  This induces systematic errors that are difficult
  to quantify  and not reducible by increased statistic. Methods based on 
 numerical simulations of lattice QCD bypass the confinement problem and ar
 e therefore best placed to determine alpha_s(m_Z) with high precision\, gi
 ven well-measured hadron masses and decay constants as experimental input.
  I will first explain the challenges for the lattice QCD approach and then
  the  strategies used by the ALPHA collaboration in our recent work. The 
 final result is  alpha_s(m_Z) = 0.11876(58)\, with a statistics-dominated
  relative error of 0.5 percent\, about half the error of the PDG average 
 of all non-lattice methods combined.\n\nSpeaker:\n* Stefan Sint (Trinity C
 ollege Dublin)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86710-1pm-2pm-how-strong-exactly-i
 s-the-strong-nuclear-force
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86696@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20251202T112436
LAST-MODIFIED:20260114T153548
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260121T123000
DTEND;TZID=Europe/London:20260121T143000
SUMMARY:1pm - 2pm: Chiral Symmetry Breaking\, Gravitational Waves and the 
 Origin of the Dark Eta Prime Mass in Confining Dark Sectors
DESCRIPTION:Dark confining sectors are phenomenologically rich. For instan
 ce a confining phase transition can be used to trigger baryogenesis\, and 
 some heavy axion models identify the dark \\eta′ particle as an axion ca
 ndidate. By modelling the dark confining phase transition with spontaneous
  symmetry breaking of chiral symmetry\, previous studies have found that a
  Gravitational Wave (GW) signal could be visible at future experiments. Th
 e mesonic potential is often modeled with a Linear Sigma Model\, including
  an explicit U(1)_A breaking term to generate the \\eta’ mass.\n\nThe \\
 eta′ meson gains its mass directly from the U(1)_A anomaly\; commonly th
 is is argued to be generated by instanton effects. However\, following ins
 tead the recent argument that results in QCD-like theories can be obtained
  from exact results in Anomaly Mediated Supersymmetry Breaking\, the \\eta
 ′ mass cannot be generated by instanton effects. Interestingly\, the mod
 ified explicit U(1)_A breaking term proposed following this argument also 
 explicitly breaks chiral symmetry. With the EFT we can only describe a sec
 ondary phase transition between non-symmetric vacua. We will discuss such 
 a phase transition in this talk\, including possible GW spectra were this 
 phase transition first-order.\n\nSpeaker:\n* Mia West (University of Flori
 da)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86696-1pm-2pm-chiral-symmetry-brea
 king-gravitational-waves-and-the-origin-of-the-dark-eta-prime-mass-in
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86784@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260106T134309
LAST-MODIFIED:20260121T104300
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260128T123000
DTEND;TZID=Europe/London:20260128T143000
SUMMARY:1pm - 2pm: Top-Yukawa- and light-quark-induced electroweakcorrecti
 ons to Higgs-Pair Production via Gluon Fusion
DESCRIPTION:Gluon fusion\, gg→HH\, is the dominant Higgs-pair production
  process at the Large HadronCollider (LHC) with direct sensitivity to the 
 trilinear Higgsself-interaction. The process is loop-induced\, with the le
 ading contribution arising from top-quark loops in the Standard Model\, an
 d QCD corrections are known to enhance the cross section significantly. Wi
 th the anticipated accuracies achievable at the high-luminosity LHC(HL-LHC
 )\, the theoretical uncertainties will be of increased relevance to compet
 e with the experimental precision at the level of less than 30%. Therefore
 \, as a first step in this direction\, we compute next-to-leading-order el
 ectroweak contributions to gg→HHfrom two sources: top-Yukawa–induced a
 nd light-quark–induced effects. I will present their impact on the total
  cross section and on the Higgs-pair invariant-mass spectrum\, highlightin
 g threshold features and the kinematic regions where electroweak effects r
 each the few-to-ten per cent level.\n\nSpeaker:\n* Arunima Bhattacharya (U
 niversity of Durham)
LOCATION:Higgs Centre Seminar Room (4305\, JCMB)
URL:https://www.ph.ed.ac.uk/events/2026/86784-1pm-2pm-top-yukawa-and-light
 -quark-induced-electroweakcorrections-to-higgs-pair-production-via-gluon
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86786@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260106T134347
LAST-MODIFIED:20260127T144435
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260204T123000
DTEND;TZID=Europe/London:20260204T143000
SUMMARY:1pm - 2pm: Topological Defects as Windows into the early Universe
DESCRIPTION:Topological defects formed in the early Universe offer a uniqu
 e window into high-energy physics. In this talk\, I will focus on two such
  phenomena. First\, I will discuss cosmic strings generated during the bre
 aking of Grand Unified Theories (GUTs) to the Standard Model and show how 
 their gravitational wave signals\, when combined with proton decay searche
 s\, can constrain GUT breaking chains and high-scale baryogenesis. I will 
 then turn to domain walls arising from the spontaneous breaking of non-Abe
 lian discrete symmetries\, such as those used in lepton flavour models. Th
 eir rich vacuum structure and late-time annihilation can also produce obse
 rvable gravitational wave signatures\, providing a complementary probe of 
 flavour physics at very high energies.\n\nSpeaker:\n* Jessica Turner (Univ
 ersity of Durham)
LOCATION:Higgs Centre Seminar Room (4305\, JCMB)
URL:https://www.ph.ed.ac.uk/events/2026/86786-1pm-2pm-topological-defects-
 as-windows-into-the-early-universe
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86750@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20251210T133944
LAST-MODIFIED:20260206T170957
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260212T110000
DTEND;TZID=Europe/London:20260212T123000
SUMMARY:11am - 12pm: Running EFT-hedron with null constraints at loop leve
 l
DESCRIPTION:Implications of general properties of quantum field theory\, s
 uch as causality\, unitarity\, and locality include constraints on the cou
 plings of the effective field theory (EFT) coefficients. These constraints
  follow from the connections between the infrared (IR) and ultraviolet (UV
 ) theory imposed by dispersion relations for four-particle amplitudes whic
 h formally allow one to express EFT couplings through the moments of posit
 ive-definite functions forming the EFT-hedron geometry. Previous studies o
 f these positivity bounds were mainly focused on the weakly coupled EFTs\,
  limiting the analysis to tree-level amplitudes of the IR theory. In this 
 work\, I will show how to extend the scope of positivity bounds including 
 one-loop amplitudes\, which is essential especially for the loops of massl
 ess particles. The results demonstrate that while for small coupling const
 ants\, the one-loop bounds are in good agreement with the tree-level resul
 ts\, the allowed EFT parameter ranges can be significantly modified if a w
 eak coupling assumption is not additionally imposed. I will discuss the di
 fficulties of obtaining the constraints in forward limit in four dimension
 s related to the infrared singularities and show how to overcome these pro
 blems by constructing finite combinations of null constraints.\n\nSpeaker:
 \n* Long-Qi Shao (University of Pisa)
LOCATION:Room 6201\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86750-11am-12pm-running-eft-hedron
 -with-null-constraints-at-loop-level
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86698@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20251202T112536
LAST-MODIFIED:20260217T112148
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260218T123000
DTEND;TZID=Europe/London:20260218T143000
SUMMARY:1pm - 2pm: New algorithms for Feynman integral reduction and $\\va
 repsilon$-factorised differential equations
DESCRIPTION:Precision calculations in quantum field theory rely very often
  on perturbation theory and thus on the computation of Feynman integrals. 
 Two of the basic algorithms are integration-by-parts and the method of dif
 ferential equations. In this talk I show how the efficiency of these algor
 ithms can be improved by taking geometric information of the Feynman integ
 rals into account. The method does not require any prior knowledge of the 
 geometry and merely amounts to counting poles and residues.\n\nSpeaker:\n*
  Stefan Weinzierl (Uni Mainz)
LOCATION:Room 4325B\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86698-1pm-2pm-new-algorithms-for-f
 eynman-integral-reduction-and-varepsilon-factorised-differential
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86748@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20251210T133627
LAST-MODIFIED:20251210T133627
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260225T123000
DTEND;TZID=Europe/London:20260225T143000
SUMMARY:1pm - 2pm: Entanglement and pair production in intense electromagn
 etic fields
DESCRIPTION:We investigate the spin correlations between electron-positron
  pairs created from a photon when it scatters in a high-intensity laser pu
 lse via the nonlinear Breit-Wheeler process. We find that the spin states 
 of the generated electron-positron pair can exhibit strong entanglement\, 
 with the degree being sensitive to the photon energy\, laser intensity\, a
 nd the relative polarisation of the photon and laser pulse. Photons with a
  high degree of polarisation can create strongly entangled pairs even in t
 he intermediate intensity (non-perturbative) regime. We find that if the p
 hotons are provided by a Compton source\, strongly spin-entangled electron
 -positron pairs can be generated with technology available today.\n\nSpeak
 er:\n* Ben King (Plymouth University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86748-1pm-2pm-entanglement-and-pai
 r-production-in-intense-electromagnetic-fields
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86860@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260114T174304
LAST-MODIFIED:20260225T095639
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260304T123000
DTEND;TZID=Europe/London:20260304T143000
SUMMARY:1pm - 2pm: Toward pion-pion scattering from lattice QCD with stagg
 ered quarks
DESCRIPTION:Scattering processes featuring the strong interactions can be 
 studied using lattice QCD by means of the Lüscher formalism. This approac
 h relies on analyticity and unitarity of the S-matrix to relate finite-vol
 ume energy levels to infinite-volume scattering amplitudes. One of the mos
 t common fermion actions in lattice QCD studies is based on staggered ferm
 ions\, due to their high computational efficiency. However\, simulations e
 mploying staggered fermions manifest unitarity-violating effects. Moreover
 \, the meson sector of this theory contains multiple pions as a result of 
 the so-called taste-splitting effects. Both of these discretization artifa
 cts scale with the square power of the lattice spacing and thus disappear 
 in the continuum. Nevertheless\, at non-zero lattice spacing\, unitarity v
 iolation and taste splitting hinder the applicability of the Lüscher form
 alism to observables computed using staggered fermions. In this talk\, we 
 will discuss two approaches to deal with the challenges of extracting scat
 tering amplitudes from staggered lattice QCD: (1) extrapolating the energy
  levels\, at a fixed volume\, to the continuum\, where the standard versio
 n of the Lüscher formalism works\, and (2) generalizing the formalism to 
 incorporate staggered lattice artifacts. In both cases\, we use the effect
 ive theory describing low-energy QCD with staggered fermions\, i.e.\, Root
 ed Staggered Chiral Perturbation Theory. Specifically\, we focus on the s
 impler case of pion-pion scattering in the isospin-2 channel\, and discuss
  prospects for other isospin channels. \n\nSpeaker:\n* Dean Valois (Unive
 rsity of Granada)
LOCATION:Higgs Centre Seminar Room (4305\, JCMB)
URL:https://www.ph.ed.ac.uk/events/2026/86860-1pm-2pm-toward-pion-pion-sca
 ttering-from-lattice-qcd-with-staggered-quarks
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86966@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260206T171100
LAST-MODIFIED:20260305T163847
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260311T123000
DTEND;TZID=Europe/London:20260311T143000
SUMMARY:1pm - 2pm: Spatial correlations in QCD at high temperature
DESCRIPTION:Quantum Chromodynamics (QCD) is the fundamental theory which d
 escribes exotic systems like the quark matter created in relativistic heav
 y-ion collisions or shortly after the Big Bang. Even though the coupling s
 trength decreases with the temperature due to asymptotic freedom\, the int
 eractions are not necessarily weak in the regime where chiral symmetry is 
 restored. Either effective field theory or numerical lattice QCD is then r
 equired to understand the interactions of quarks and gluons in such a phas
 e. Spatial correlations are an interesting class of observables which can 
 be used to test effective theories and even provide constraints on dynamic
 al processes. I will outline some progress and some challenges in computin
 g such correlation functions in the framework of lattice simulations.\n\n
 Speaker:\n* Tim Harris (ETH Zurich)
LOCATION:Higgs Centre Seminar Room (4305\, JCMB)
URL:https://www.ph.ed.ac.uk/events/2026/86966-1pm-2pm-spatial-correlations
 -in-qcd-at-high-temperature
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86862@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260114T174408
LAST-MODIFIED:20260313T143032
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260318T123000
DTEND;TZID=Europe/London:20260318T143000
SUMMARY:1pm - 2pm: Quantum Simulation with Finite Groups
DESCRIPTION:A possibility to overcome certain difficulties with numerical 
 simulations of quantum field theories is to use quantum computers rather t
 han classical ones. This poses several theoretical challenges\, as it requ
 ires working in a Hamiltonian picture with a finite-dimensional Hilbert sp
 ace. For gauge theories\, one possibility is to replace the gauge group wi
 th one of its finite subgroups. After reviewing the problem and its possib
 le solutions\, we will discuss the ongoing search for a formulation which 
 would allow one to recover continuum gauge theories from locally finite-di
 mensional models.\n\nSpeaker:\n* Alessandrio Mariani (University of Turin)
LOCATION:Higgs Centre (Room 4305)\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86862-1pm-2pm-quantum-simulation-w
 ith-finite-groups
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-87124@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260305T164038
LAST-MODIFIED:20260305T164038
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260325T123000
DTEND;TZID=Europe/London:20260325T143000
SUMMARY:1pm - 2pm: Entropic order
DESCRIPTION:It is commonly expected that increasing temperature drives phy
 sical systems towards disorder. Surprisingly\, certain models are conjectu
 red to exhibit the opposite behaviour: at extremely high temperatures they
  enter an ordered phase\, stabilized by entropy. After a gentle introducti
 on to this counterintuitive phenomenon\, I will outline the main ideas beh
 ind a rigorous proof showing that such entropically driven order can indee
 d occur. No prior familiarity with the topic will be assumed.\n\nSpeaker:\
 n* Enrico Andriolo (Durham University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/87124-1pm-2pm-entropic-order
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86968@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260206T171447
LAST-MODIFIED:20260330T132430
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260401T123000
DTEND;TZID=Europe/London:20260401T143000
SUMMARY:1pm - 2pm: Gravitational Waveforms from Field Theory
DESCRIPTION:In recent years\, we have witnessed how newly introduced field
 -theoretic tools have rapidly pushed the state-of-the-art of precision com
 putations in the context of gravitational physics. In this talk\, I will r
 eview recent progress on the extraction of the gravitational waveforms fro
 m (quantum) field theory\, the cutting-edge results\, and the comparison w
 ith other methods\, as well as a new understanding of the structure of asy
 mptotic infinity.\n\nSpeaker:\n* Stefano de Angelis (IPhT Saclay)
LOCATION:Room 4325B\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86968-1pm-2pm-gravitational-wavefo
 rms-from-field-theory
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86970@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260206T171646
LAST-MODIFIED:20260402T103243
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260408T123000
DTEND;TZID=Europe/London:20260408T143000
SUMMARY:1pm - 2pm: Hadronic resonances from Lattice QCD
DESCRIPTION:The majority of known hadrons in the low-energy QCD spectrum a
 re resonances observed in multi-particle scattering processes. First-princ
 iples determinations of the properties of these unstable hadrons are a cen
 tral goal of lattice QCD. Significant progress has been made in the develo
 pment\, implementation\, and application of theoretical tools that connect
  finite-volume lattice QCD quantities to scattering amplitudes\, enabling 
 the determination of the masses and widths of a variety of hadronic resona
 nces. In this talk\, I will discuss recent advances in lattice QCD studies
  of meson-baryon resonances\, including the $\\Lambda(1405)$\, baryon-bary
 on systems such as the deuteron\, and exotic three-hadron states such as t
 he doubly charmed tetraquark.\n\nSpeaker:\n* Fernando Romero-Lopez (Uni Be
 rn)
LOCATION:Higgs Centre Seminar Room (4305\, JCMB)
URL:https://www.ph.ed.ac.uk/events/2026/86970-1pm-2pm-hadronic-resonances-
 from-lattice-qcd
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-87126@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260305T164245
LAST-MODIFIED:20260305T164321
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260415T123000
DTEND;TZID=Europe/London:20260415T143000
SUMMARY:1pm - 2pm: TBA
DESCRIPTION:TBA\n\nSpeaker:\n* Chris White (Queen Mary University of Londo
 n)
LOCATION:Room 4325B\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/87126-1pm-2pm-tba
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86972@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260206T171803
LAST-MODIFIED:20260206T171803
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260422T123000
DTEND;TZID=Europe/London:20260422T143000
SUMMARY:1pm - 2pm: TBA
DESCRIPTION:TBA\n\nSpeaker:\n* Enrico Pajer (University of Cambridge)
LOCATION:Room 4325B\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86972-1pm-2pm-tba
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-87030@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260218T082728
LAST-MODIFIED:20260218T082728
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260427T123000
DTEND;TZID=Europe/London:20260427T143000
SUMMARY:1pm - 2pm: TBA
DESCRIPTION:TBA\n\nSpeaker:\n* Claudio Bonanno (Uni Bern)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/87030-1pm-2pm-tba
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86974@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260206T172011
LAST-MODIFIED:20260206T172011
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260429T123000
DTEND;TZID=Europe/London:20260429T143000
SUMMARY:1pm - 2pm: TBA
DESCRIPTION:TBA\n\nSpeaker:\n* Melissa van Beekveld (Nikhef)
LOCATION:Higgs Centre Seminar Room (4305\, JCMB)
URL:https://www.ph.ed.ac.uk/events/2026/86974-1pm-2pm-tba
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-86976@www.ph.ed.ac.uk
DTSTAMP:20260414T001900
CREATED:20260206T172114
LAST-MODIFIED:20260206T172114
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20260506T123000
DTEND;TZID=Europe/London:20260506T143000
SUMMARY:1pm - 2pm: TBA
DESCRIPTION:TBA\n\nSpeaker:\n* Paul Hoyer (University of Helsinki)
LOCATION:Higgs Centre (Room 4305)\, JCMB
URL:https://www.ph.ed.ac.uk/events/2026/86976-1pm-2pm-tba
END:VEVENT
END:VCALENDAR