BEGIN:VCALENDAR
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-79819@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191120T091821
LAST-MODIFIED:20191202T104131
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20191206T110000
DTEND;TZID=Europe/London:20191206T120000
SUMMARY:Differential equations and iterated integrals for massive multi-lo
op Feynman integrals
DESCRIPTION:In this talk I will give an overview of the differential equat
ions method for the calculation of multi-loop Feynman integrals\, which wa
s recently applied to several cases where massive legs and propagators are
present.\n I will discuss how the systems of differential equations arise
\, how they are brought in canonical form with the help of the Magnus expo
nential\, what functions can be used to give a closed-form representation
of the solution\, and how they are analytically continued to the kinematic
regions of interest.\n Some examples will be given\, such as the master i
ntegrals for the NNLO QED corrections to mu-e scattering\, which are cruci
al for the physics program of MUonE\, an experiment proposed with the goal
of determining the leading hadronic contribution to the muon g-2 in a nov
el way.\n\nSpeaker:\n* Dr Stefano Di Vita (INFN Milano)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2019/79819-differential-equations-and-i
terated-integrals-for-massive-multi-loop-feynman-integrals
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79639@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20190923T093100
LAST-MODIFIED:20191204T130235
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20191211T140000
DTEND;TZID=Europe/London:20191211T150000
SUMMARY:(Precision) New Physics searches within the LHC dataset
DESCRIPTION:In this talk we will discuss how to perform precision calculat
ions in the SMEFT framework\, in order to parametrise small deviations fro
m the SM predictions. We will discuss how to implement the complex mass sc
heme in an EFT calculation and how to go beyond leading order. \n\nFurthe
r we will discuss how to extract numerical predictions for different elect
roweak processes in order to look for new physics within the LHC run-2 and
upcoming runs.\n\nSpeaker:\n* Raquel Gomez Ambrosio (Durham University)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2019/79639-precision-new-physics-search
es-within-the-lhc-dataset
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79865@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191129T141024
LAST-MODIFIED:20200106T122737
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200108T140000
DTEND;TZID=Europe/London:20200108T150000
SUMMARY:The Dilaton Potential and Lattice Data
DESCRIPTION:Lattice studies of a certain class of confining gauge\ntheorie
s indicate the presence of an anomalously light scalar in the\nspectrum of
composites. Gauge theories in this class are chosen to have a\nlight ferm
ion count lying just below the threshold value for entry into\nthe conform
al window. In this talk\, I will discuss recent work in which\nthis light
scalar is interpreted as a dilaton and a simple EFT description\nfor it is
studied and used to analyse recent lattice results. In this\nwork\, we ad
opt a simple form for the dilaton potential in the EFT\, which\ninterpolat
es among earlier proposals. It describes departures from\nconformal symmet
ry\, by the insertion of a single operator at leading order\nin the EFT. U
sing the lattice measurements\, we extract model parameter\nvalues\, inclu
ding those that characterise the scalar potential. The\nresults suggest th
at the EFT provides a good fit to the data\, and include\nthe possibility
that the conformal deformation is clearly non-marginal.\n\nSpeaker:\n* Jam
es Ingoldby (ICTP - Trieste)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79865-the-dilaton-potential-and-la
ttice-data
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79883@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191211T091624
LAST-MODIFIED:20200108T100438
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200115T140000
DTEND;TZID=Europe/London:20200115T150000
SUMMARY:Gravitational scattering and radiation in the eikonal approach - E
merging Hawking-like radiation in gravitational scattering beyond the Plan
ck scale
DESCRIPTION:We generalize the semiclassical treatment of graviton radiatio
n to\n gravitational scattering at very large energies\n $E >> m_P$ and fi
nite scattering angles $\\Theta_s$\, so as to approach the\n collapse regi
me. Our basic tool is the\n extension of the recently proposed\, unified f
orm of radiation to the\n Amati-Ciafaloni-Veneziano reduced-action model.\
n By resumming eikonal scattering diagrams\, we\n are able to derive the c
orresponding (unitary) coherent-state operator.\n The resulting graviton s
pectrum turns out to be tuned on the gravitational\n radius $R$ for small
angles $\\Theta_s << 1$ but\, for sizeable\n angles $\\Theta_s \\sim 1$ a
cquires an exponential cutoff of the large frequency\n region ($\\omega >
1/R$)\, due to energy conservation\, so as to emit a\n finite fraction of
the total energy. In the approach-to-collapse regime we\n find a radiation
enhancement due to large tidal forces\, so that\n the whole energy is rad
iated off\, with a large multiplicity\n $ \\sim Gs >> 1$ and a well-de
fined frequency cutoff of order $1/R$. The latter\n corresponds to the Haw
king temperature for a black hole of mass\n somewhat smaller than $E$.\n\n
Speaker:\n* Dr Dimitri Colferai (University of Florence)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79883-gravitational-scattering-and
-radiation-in-the-eikonal-approach-emerging-hawking-like-radiation-in
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79801@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191112T215146
LAST-MODIFIED:20200123T102338
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200122T140000
DTEND;TZID=Europe/London:20200122T150000
SUMMARY:A non-perturbative mechanism for fermion mass generation
DESCRIPTION:In this talk I present (numerical) evidence for the existence
of a field-theoretical mechanism that can provide mass to fermions in mode
ls with fermions\, non-abelian gauge fields and scalars\, where chiral sym
metry is broken at the cutoff level by some irrelevant term\, provided the
model parameters are tuned to critical values at which chiral symmetry is
maximally restored. We show that in the Nambu-Goldstone phase of the crit
ical model fermions acquire a non-perturbative mass of the order of the RG
I scale of the theory times powers of the coupling constant of the gauge i
nteraction the fermion is subjected to and independent of the scalar vev.
The peculiar structure of this mass term 1) suggests the existence of a s
uper-strong non-abelian sector at the (multi)TeV scale as\, in order to ha
ve the top mass at its physical value\, the RGI scale of the theory must b
e much larger than $\\Lambda_{QCD}$\, 2) it suggests that the fermion mass
hierarchy is a consequence of the different strength of the interaction t
he particles feel.\n\nSpeaker:\n* Professor Giancarlo Rossi (Universita' d
i Roma "Tor Vergata")
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79801-a-non-perturbative-mechanism
-for-fermion-mass-generation
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79797@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191112T152706
LAST-MODIFIED:20200224T094144
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200129T140000
DTEND;TZID=Europe/London:20200129T150000
SUMMARY:Ghosts\, spheres\, and the double copy
DESCRIPTION:I will present a formulation of gravity as a double copy of ga
uge theories in the context of the Becchi-Rouet-Stora-Tyutin (BRST) formal
ism. I will show how this gives an algorithm for consistently mapping gaug
e choices from YM to gravity. Moreover\, it resolves the issue of the dila
ton degree of freedom arising in the double copy\, thus allowing for the c
onsistent construction of solutions in General Relativity. I will descri
be the perturbative construction at higher orders\, as well as the formula
tion of the BRST double copy in a spherical background.\n\nSpeaker:\n* Dr
Silvia Nagy (University of Nottingham)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79797-ghosts-spheres-and-the-doubl
e-copy
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79897@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191213T155014
LAST-MODIFIED:20200224T093921
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200212T140000
DTEND;TZID=Europe/London:20200212T150000
SUMMARY:The Equal-Mass Banana Integral and Integrals of Modular Forms
DESCRIPTION:Great progress in the analytic computation of scattering ampli
tudes was made in recent years utilising our good understanding of polylog
arithms. With demands for higher precision calculations including massive
states\, we are now often confronted with functional dependences that lie
beyond the realm of polylogarithms. We investigate the relation between di
fferent Riemann surfaces and the connected function spaces\, define a usef
ul basis of functions for the computation of scattering amplitudes and wil
l show how to compute the equal-mass banana integral in terms of these fun
ctions.\n\nSpeaker:\n* Dr Robin Marzucca (IPPP Durham)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79897-the-equal-mass-banana-integr
al-and-integrals-of-modular-forms
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79894@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191212T182029
LAST-MODIFIED:20200213T131632
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200219T140000
DTEND;TZID=Europe/London:20200219T150000
SUMMARY:What if Planet 9 is a Primordial Black Hole?
DESCRIPTION:We highlight that the anomalous orbits of Trans-Neptunian Obje
cts (TNOs) and an excess in microlensing events in the 5-year OGLE dataset
can be simultaneously explained by a new population of astrophysical bodi
es with mass several times that of Earth (M⊕). We take these objects to
be primordial black holes (PBHs) and point out the orbits of TNOs would be
altered if one of these PBHs was captured by the Solar System\, inline wi
th the Planet 9 hypothesis. Capture of a free floating planet is a leading
explanation for the origin of Planet 9 and we show that the probability o
f capturing a PBH instead is comparable. The observational constraints on
a PBH in the outer Solar System significantly differ from the case of a ne
w ninth planet. This scenario could be confirmed through annihilation sign
als from the dark matter microhalo around the PBH.\n\nSpeaker:\n* Dr Jakub
Scholtz (IPPP Durham)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79894-what-if-planet-9-is-a-primor
dial-black-hole
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79764@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191105T125020
LAST-MODIFIED:20200309T111125
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200311T140000
DTEND;TZID=Europe/London:20200311T150000
SUMMARY:Applications of Nonrelativistic Theories: Gravitational Waves and
Higgs Boson Production
DESCRIPTION:The study of non-relativistic bound systems has a long history
in\nphysics and is still highly relevant today. I outline how modern\neff
ective field theory methods enable us to systematically improve their\ndes
cription. As examples\, I discuss compact binary systems as sources of\ngr
avitational waves and the production of Higgs bosons and Higgs boson\npair
s in gluon fusion at the LHC.\n\n\nSpeaker:\n* Andreas Martin Maier (DESY
- Zeuthen)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79764-applications-of-nonrelativis
tic-theories-gravitational-waves-and-higgs-boson-production
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79762@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191105T124639
LAST-MODIFIED:20200316T090553
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200318T140000
DTEND;TZID=Europe/London:20200318T150000
SUMMARY:[CANCELLED] Astrid Eichhorn
DESCRIPTION:tba\n\nSpeaker:\n* Astrid Eichhorn (CP3-Origins)
LOCATION:Room 6206\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79762-astrid-eichhorn
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79794@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191111T114715
LAST-MODIFIED:20200316T090659
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200325T140000
DTEND;TZID=Europe/London:20200325T150000
SUMMARY:[CANCELLED] Maxim Polyakov
DESCRIPTION:tba\n\nSpeaker:\n* Prof. Maxim Polyakov (Ruhr-Universität Boc
hum)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79794-maxim-polyakov
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80046@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200305T165713
LAST-MODIFIED:20200318T160713
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200401T140000
DTEND;TZID=Europe/London:20200401T150000
SUMMARY:[CANCELLED] Maeve Madigan
DESCRIPTION:tba\n\nSpeaker:\n* Maeve Madigan (University of Cambridge)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/80046-maeve-madigan
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79998@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200224T092450
LAST-MODIFIED:20200311T154755
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200408T140000
DTEND;TZID=Europe/London:20200408T150000
SUMMARY:[CANCELLED] Rainer Sommer
DESCRIPTION:tba\n\nSpeaker:\n* Prof Rainer Sommer (DESY)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79998-rainer-sommer
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79851@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191125T135849
LAST-MODIFIED:20200404T155612
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200415T140000
DTEND;TZID=Europe/London:20200415T150000
SUMMARY:[CANCELLED] David Berman
DESCRIPTION:tba\n\nSpeaker:\n* David Berman (Queen Mary University of Lond
on)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79851-david-berman
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79816@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191119T092356
LAST-MODIFIED:20200416T160613
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200422T140000
DTEND;TZID=Europe/London:20200422T150000
SUMMARY:[CANCELLED] Antoine Gerardin
DESCRIPTION:tba\n\nSpeaker:\n* Dr Antoine Gerardidn (University of Marseil
le)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79816-antoine-gerardin
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79911@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200106T113932
LAST-MODIFIED:20200429T130932
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200429T140000
DTEND;TZID=Europe/London:20200429T150000
SUMMARY:Local anomalies in Z’ models
DESCRIPTION:In this talk I will follow the work presented in arXiv:1912.10
022 in which we consider local (or perturbative) gauge anomalies in models
featuring an extra Z′ boson compared to the Standard Model (SM)\, alo
ng with n SM-singlet fermions. Assuming that the gauge group is compact\
, we give a general solution to the anomaly cancellation conditions (ACCs)
for the ACCs that involve only SM fermions and we examine whether a corre
sponding solution exists for the remaining ACCs. We argue that this should
be adequate for the purposes of phenomenology\, at least for the time bei
ng. We show that a solution to the remaining ACCs always exists for n≥5
in the family non-universal case or n≥3 in the family-universal case
. In the special case where only a single family carries non-vanishing cha
rges\, we find a general solution to all ACCs\, for any value of n.\n\nSp
eaker:\n* Joseph Tooby-Smith (University of Cambridge)
LOCATION:https://eu.bbcollab.com/guest/2a2214c8a7a34711ae4d829c5b1a875d
URL:https://www.ph.ed.ac.uk/events/2020/79911-local-anomalies-in-z-models
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79989@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200214T140025
LAST-MODIFIED:20200430T152049
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200506T140000
DTEND;TZID=Europe/London:20200506T150000
SUMMARY:Power-enhanced QED corrections in flavour physics
DESCRIPTION:QED effects in flavour physics are ubiquitous but still not we
ll-understood due to the intrinsically non-perturbative nature of QCD boun
d states. \nI will discuss how modern methods based on soft-collinear effe
ctive field theory can be applied to understand QED corrections in QCD bou
nd states. \nUsing the example of the leptonic decay of the strange B-meso
n\, I will show how non-local QED effects can lead to power-enhanced corre
ctions \nin the heavy quark expansion and how the QED corrections can be s
ystematically resummed.\n\nSpeaker:\n* Robert Szafron (CERN)
LOCATION:https://eu.bbcollab.com/guest/ef4ef27377da4f9f84f740b49c28509e
URL:https://www.ph.ed.ac.uk/events/2020/79989-power-enhanced-qed-correctio
ns-in-flavour-physics
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79892@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191211T230559
LAST-MODIFIED:20200516T102445
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200520T140000
DTEND;TZID=Europe/London:20200520T150000
SUMMARY:[CANCELLED] Oscar Cata
DESCRIPTION:tba\n\nSpeaker:\n* Prof Oscar Cata (University of Siegen)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79892-oscar-cata
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80000@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200224T122523
LAST-MODIFIED:20200520T152733
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200527T140000
DTEND;TZID=Europe/London:20200527T150000
SUMMARY:Looking at QED through the glasses of Very Special Relativity
DESCRIPTION:The proposal of Cohen and Glashow (Phys.Rev.Lett. 97 (2006)
021601)\, that the universe could be invariant under a subgroup of the L
orentz group instead of the full group\, offers a solution for the neutrin
o mass without introducing new particles. In this talk we will review the
main features of the model and how the non-local operators present in VSR
theories modify QED in 1+1\, 2+1 and 3+1 dimensions.\n\nSpeaker:\n* Alex S
oto Villaroel (Pontificia Universidad Católica de Chile)
LOCATION:https://eu.bbcollab.com/guest/6f53ef837eb845e8ae24750c4cad0c93
URL:https://www.ph.ed.ac.uk/events/2020/80000-looking-at-qed-through-the-g
lasses-of-very-special-relativity
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79970@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200205T091121
LAST-MODIFIED:20200519T144315
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200603T140000
DTEND;TZID=Europe/London:20200603T150000
SUMMARY:[CANCELLED] Bernat Capdevila Soler
DESCRIPTION:tba\n\nSpeaker:\n* Bernat Capdevila Soler (Università degli S
tudi di Torino)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79970-bernat-capdevila-soler
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79814@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20191118T094938
LAST-MODIFIED:20200622T173413
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200611T140000
DTEND;TZID=Europe/London:20200611T150000
SUMMARY:Georgios Papathanasiou (DESY): All-order amplitudes at any multipl
icity in the multi-Regge limit
DESCRIPTION:Maximally supersymmetric Yang-Mills theory serves as a unique
theoretical laboratory connecting beautiful mathematics to realistic appli
cations. In this talk I present a complete perturbative solution for the p
lanar scattering amplitudes of the theory at any loop order and multiplici
ty\, in certain region of the conceptually important multi-Regge limit. I
describe how the expected integrability of the theory\, and analytic struc
ture of amplitudes in the limit\, are key for arriving at this solution. F
inally\, I sketch a proof of the maximal transcendentality principle as an
application.\n\nSpeaker:\n* Dr Georgios Papathanasiou (DESY\, Hamburg)
LOCATION:https://eu.bbcollab.com/guest/f5996c7d1d4942dc89d16ea593534e62
URL:https://www.ph.ed.ac.uk/events/2020/79814-georgios-papathanasiou-desy-
all-order-amplitudes-at-any-multiplicity-in-the-multi-regge-limit
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79975@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200206T092750
LAST-MODIFIED:20200520T161122
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200617T140000
DTEND;TZID=Europe/London:20200617T150000
SUMMARY:[CANCELLED] Alessandro Pilloni
DESCRIPTION:tba\n\nSpeaker:\n* Alessandro Pilloni (ECT* Trento)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/79975-alessandro-pilloni
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80056@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200312T092240
LAST-MODIFIED:20200619T150814
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200624T140000
DTEND;TZID=Europe/London:20200624T150000
SUMMARY:[CANCELLED] Kai Yan
DESCRIPTION:tba\n\nSpeaker:\n* Dr Kai Yan (MPI Munich)
LOCATION:Higgs Centre Seminar Room\, Room 4305\, JCMB
URL:https://www.ph.ed.ac.uk/events/2020/80056-kai-yan
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79924@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200113T143637
LAST-MODIFIED:20200520T154955
STATUS:CANCELLED
DTSTART;TZID=Europe/London:20200629T140000
DTEND;TZID=Europe/London:20200629T150000
SUMMARY:[CANCELLED] Making sense of the Nambu-Jona-Lasinio model via scale
invariance
DESCRIPTION:The status of the chiral-invariant Nambu-Jona-Lasinio (NJL) fo
ur-fermi model is quite equivocal. It serves as the paradigm for dynamical
symmetry breaking and yet it is not renormalizable. NJL only studied one
loop graphs with point vertices\, and needed to use an ultraviolet cutoff.
We propose to dress the point vertices with scale invariant vertices with
anomalous dimensions. We show that if the dimension of the $\\bar{\\psi}\
\psi$ fermion mass operator is reduced from a canonical three to a dynamic
al two\, the four fermion interaction becomes renormalizable to all orders
in the four-fermion coupling constant. Additionally\, we find that dynami
cal symmetry breaking then occurs with the fermion becoming massive\, and
we obtain a dynamical massless pseudoscalar Goldstone boson and a dynamica
l scalar Higgs boson. The Higgs boson mass is automatically of order the d
ynamical fermion mass\, with there thus being no hierarchy problem. The Hi
ggs boson automatically has a width\, and the width could serve as a diagn
ostic to distinguish a dynamical Higgs from an elementary one. We extend t
he scale invariance to local conformal invariance as then coupled to a gra
vity theory\, conformal gravity\, that is conformal too. With Bender and M
annheim having shown that conformal gravity is a ghost-free\, unitary theo
ry\, it can serve as a consistent theory of quantum gravity. We show that
all of the achievements of supersymmetry can be achieved by conformal symm
etry and conformal gravity instead\, with there then being no need for any
new particles at the LHC.\n\nSpeaker:\n* Prof Philip Mannheim (University
of Connecticut)
LOCATION:4325A\, James Clerk Maxwell Building\, King's Buildings
URL:https://www.ph.ed.ac.uk/events/2020/79924-making-sense-of-the-nambu-jo
na-lasinio-model-via-scale-invariance
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-79954@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200128T155201
LAST-MODIFIED:20200708T154521
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200708T140000
DTEND;TZID=Europe/London:20200708T150000
SUMMARY:Differential equations for one-loop string integrals
DESCRIPTION:This talk is dedicated to mathematical structures in the low-e
nergy expansion of \none-loop string amplitudes. I will review basics of s
tring perturbation theory and \ngive examples of connections with number t
heory from the integration over moduli \nof punctured worldsheet. At one l
oop\, the insertion of external states on the open- \nand closed-string wo
rldsheets requires integration over punctures on a cylinder \nboundary and
a torus\, respectively. Suitable bases of such integrals will be shown \n
to obey simple first-order differential equations in the modular parameter
of the \nsurface. These differential equations will be exploited to perfo
rm the integrals \norder by order in the inverse string tension\, similar
to modern strategies for \ndimensionally regulated Feynman integrals. Our
method manifests the appearance \nof iterated integrals over holomorphic E
isenstein series in the low-energy expansion. \nMoreover\, infinite famili
es of Laplace equations can be generated for the modular \nforms in closed
-string low-energy expansions.\n\nSpeaker:\n* Prof Oliver Schlotterer (Uni
versity of Uppsala)
LOCATION:https://eu.bbcollab.com/guest/9c7618378d804924a3a3ecd1521672a3
URL:https://www.ph.ed.ac.uk/events/2020/79954-differential-equations-for-o
ne-loop-string-integrals
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80723@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200729T163335
LAST-MODIFIED:20200914T100227
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200902T140000
DTEND;TZID=Europe/London:20200902T150000
SUMMARY:Positivity Bounds: Building UV/IR Connections Using Scattering Amp
litudes
DESCRIPTION:The Effective Field Theory (EFT) framework has proven immensel
y successful in both particle physics and cosmology\, providing a means of
describing low-energy observations in the IR without reference to the (as
yet unknown) high-energy physics in the UV.\n But this decoupling of the
UV from the IR also presents a major obstacle to uncovering new fundamenta
l physics beyond the Standard Model and LambdaCDM - since it is not possib
le to probe the relevant energy scales directly\, it is difficult to go be
yond our low-energy effective descriptions.\n In this talk\, I will presen
t new developments in overcoming this obstacle.\n Certain fundamental prop
erties in the UV (such as causality\, locality and unitarity) leave charac
teristic imprints on the EFT scattering amplitude in the IR. These imprint
s\, known as “positivity bounds”\, can be used to bridge the gap betwe
en the UV and IR regimes.\n I will show how features of the UV can be infe
rred from our low-energy measurements\, and conversely how UV axioms can b
e used as priors to improve our IR parameter estimation of EFT coefficient
s.\n These “positivity” connections between the UV and IR regimes prov
ide us with a new way of analysing low-energy EFTs that will guide us towa
rds a better understanding of the new physics which lies beyond our curren
t models.\n\nSpeaker:\n* Dr Scott Melville (University of Cambridge)
LOCATION:https://ed-ac-uk.zoom.us/j/93887094261
URL:https://www.ph.ed.ac.uk/events/2020/80723-positivity-bounds-building-u
vir-connections-using-scattering-amplitudes
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80850@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200902T095502
LAST-MODIFIED:20200917T093337
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20200916T140000
DTEND;TZID=Europe/London:20200916T150000
SUMMARY:Massive Conformal Symmetry and Integrability for Feynman Integrals
DESCRIPTION:Since the rise of the AdS/CFT duality\, integrability has prov
en to be an important \ntool to advance our understanding of massless QFT.
\nIn this talk we demonstrate that integrability is also present in massi
ve QFT in D>2 \nspacetime dimensions. After reviewing the connection betwe
en AdS/CFT integrability \nand massless Feynman graphs\, we show that larg
e classes of massive Feynman integrals \nare highly constrained by an infi
nite dimensional Yangian extension of dual conformal \nsymmetry. When tran
slated to momentum space\, this leads to a novel massive generalization \n
of ordinary conformal symmetry. Finally\, we introduce a massive version o
f the so-called \nfishnet theory and argue that these features of massive
Feynman integrals can be understood \nas the integrability of planar scatt
ering amplitudes in this theory.\n\n\nSpeaker:\n* Florian Loebbert (Humbol
dt University Berlin)
LOCATION:https://ed-ac-uk.zoom.us/j/93564654489
URL:https://www.ph.ed.ac.uk/events/2020/80850-massive-conformal-symmetry-a
nd-integrability-for-feynman-integrals
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80952@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20201005T112014
LAST-MODIFIED:20201028T163402
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20201028T140000
DTEND;TZID=Europe/London:20201028T150000
SUMMARY:What are Black Holes?
DESCRIPTION:General Relativity conclusively establishes that when a suffic
iently large amount of matter is confined within a fixed volume\, \nthis m
atter will undergo gravitational collapse and form a singularity i.e. a po
int where General Relativity is broken. \nWhat happens to this collapsed o
bject? It is conventionally assumed that the Schwarzschild solution that i
s derived from General \nRelativity describes this space-time\, even thoug
h General Relativity cannot be used to describe the evolution of this coll
apsed \nobject once a singularity has formed. This assumption should be qu
estioned since the Schwarzschild geometry leads to the black \nhole inform
ation problem. Are there other possible final states? In this talk\, I wil
l present spherically symmetric solutions \nto Einstein’s equations whic
h are equivalent to canonical Schwarzschild black holes on the exterior bu
t with singular \n(i.e. Planck density) shells just outside their horizon\
, leading to a macroscopic singularity. These solutions are inspired by \n
the macroscopic singularities that need to exist at the inner horizons of
Reissner-Nordstrom and Kerr black holes to solve the \nCauchy horizon prob
lems of those geometries. While we can show the existence of such solution
s and analyze their stability\, \nwe cannot rigorously address their forma
tion - instead\, we suggest plausibility arguments for how “normal” bl
ack hole states may \nevolve into these solutions. We argue that the singu
lar nature of these solutions is critical for their formation from generic
\ninitial conditions\, distinguishing this class of solutions from black
hole mimickers such as gravastars and fuzzballs. \nWe also comment on poss
ible experimental tests in gravitational wave and electromagnetic observat
ories. \n\n\nMeeting Link:\n\nJoin Zoom Meeting\n\nhttps://ed-ac-uk.zoom.u
s/j/89108840817\n\nMeeting ID: 891 0884 0817\n\nPasscode: 8rJhS^gh\n\nJoin
by Skype for Business\n\nhttps://ed-ac-uk.zoom.us/skype/89108840817\n\nSp
eaker:\n* Prof Surjeet Rajendran (John Hopkins University)
LOCATION:Online - link below
URL:https://www.ph.ed.ac.uk/events/2020/80952-what-are-black-holes
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-81049@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20201023T155919
LAST-MODIFIED:20201104T153356
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20201104T140000
DTEND;TZID=Europe/London:20201104T150000
SUMMARY:An overview of Exceptional Field Theory with applications to the d
ouble copy for M-theory
DESCRIPTION:I will review an extension of general relativity called except
ional field theory that combines p-form gauge fields with the metric to fo
rm\n a single geometric quantity called the Generalised metric. As an appl
ication of this the Kerr-Schild Ansatz is for exceptional field theory\n a
nd applied to give a double copy type construction for the fields of M-the
ory. \n\nMeeting Link:\n\nJoin Zoom Meetinghttps://ed-ac-uk.zoom.us/j/840
24662450\n \n Meeting ID: 840 2466 2450\n Passcode: 9LJB1NrJ\n \n Join
by Skype for Businesshttps://ed-ac-uk.zoom.us/skype/84024662450\n\nSpeake
r:\n* David Berman (Queen Mary University of London)
LOCATION:Online - see below
URL:https://www.ph.ed.ac.uk/events/2020/81049-an-overview-of-exceptional-f
ield-theory-with-applications-to-the-double-copy-for-m-theory
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80899@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200909T224851
LAST-MODIFIED:20201111T144419
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20201111T130000
DTEND;TZID=Europe/London:20201111T140000
SUMMARY:Stress-testing the Standard Model with lattice QCD
DESCRIPTION:I will show recent results from the HPQCD collaboration that a
llow stringent tests of the Standard Model \nin the physics of mesons cont
aining charm and bottom quarks. \nTuning quark masses and normalising curr
ent operators are critical to accuracy and I will discuss our recent \nimp
roved determination of the charm quark mass and current renormalisation fa
ctors for accurate matrix elements. \nI will also show results for meson d
ecay constants\, semileptonic form factors and B/Bs mixing amplitudes\, \n
all of which provide SM results for combining with experiment to determine
CKM elements or tests for new physics.\n\nMeeting Link:\n\nJoin Zoom Meet
ing\n\nhttps://ed-ac-uk.zoom.us/j/89359844439\n\nMeeting ID: 893 5984 4439
\n\nPasscode: 6ibhBzty\n\nJoin by Skype for Business\n\nhttps://ed-ac-uk.z
oom.us/skype/89359844439\n\nSpeaker:\n* Prof Christine Davies (University
of Glasgow)
LOCATION:Online - see below
URL:https://www.ph.ed.ac.uk/events/2020/80899-stress-testing-the-standard-
model-with-lattice-qcd
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80852@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200902T095717
LAST-MODIFIED:20201118T152333
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20201118T140000
DTEND;TZID=Europe/London:20201118T150000
SUMMARY:Black hole perturbation theory and gravitational wave source model
ling
DESCRIPTION:Central to the gravitational wave detections by the current LI
GO-Virgo-KAGRA network of ground based detectors\, has been the underlying
analytical and numerical models of binary systems of compact objects (bla
ck holes\, neutron stars or combinations thereof). With future space based
detectors such as LISA\, new sources of gravitational waves will necessit
ate the need for new analytical models. One such source are extreme mass-r
atio inspirals\, where a ~10 solar mass compact object orbits a galactic-c
entre type massive black hole of ~10^6 solar masses.\n\nIn this talk I wil
l overview the role of black hole perturbation theory in describing these
objects using the gravitational self-force approach\, with an emphasis on
the relation to other analytical approaches to two-body dynamics in genera
l relativity. I will also discuss the use of analytic perturbation theory
to describe gravitational wave scattering in black hole spacetimes\, and t
he relation between this problem and scattering amplitudes for massive spi
nning particles in quantum field theory.\n\nMeeting Link:\n\nJoin Zoom Mee
ting\n\nhttps://ed-ac-uk.zoom.us/j/88619795004\n\nMeeting ID: 886 1979 500
4\n\nPasscode: 3f8u10&^\n\nJoin by Skype for Business\n\nhttps://ed-ac-uk.
zoom.us/skype/88619795004\n\nSpeaker:\n* Chris Kavanagh (Max Planck Instit
ute Potsdam)
LOCATION:Online - see below
URL:https://www.ph.ed.ac.uk/events/2020/80852-black-hole-perturbation-theo
ry-and-gravitational-wave-source-modelling
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80919@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20200918T214023
LAST-MODIFIED:20201005T164903
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20201202T170000
DTEND;TZID=Europe/London:20201202T180000
SUMMARY:Clifford Cheung (NOTE: unusual time)
DESCRIPTION:tba\n\nSpeaker:\n* Prof Clifford Cheung (Caltech)
LOCATION:Online - details to follow
URL:https://www.ph.ed.ac.uk/events/2020/80919-clifford-cheung-note-unusual
-time
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-81104@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20201106T100901
LAST-MODIFIED:20201106T100901
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20201209T140000
DTEND;TZID=Europe/London:20201209T150000
SUMMARY:Eike Müller
DESCRIPTION:tba\n\nSpeaker:\n* Prof Eike Müller (University of Bath)
LOCATION:Online - details to follow
URL:https://www.ph.ed.ac.uk/events/2020/81104-eike-muller
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
UID:EVENT-80980@www.ph.ed.ac.uk
DTSTAMP:20201127T052711
CREATED:20201009T130408
LAST-MODIFIED:20201009T130408
STATUS:CONFIRMED
DTSTART;TZID=Europe/London:20210120T140000
DTEND;TZID=Europe/London:20210120T150000
SUMMARY:Guy Moore
DESCRIPTION:tba\n\nSpeaker:\n* Prof Guy Moore (Technical University of Dar
mstadt)
LOCATION:Online - details to follow
URL:https://www.ph.ed.ac.uk/events/2021/80980-guy-moore
END:VEVENT
END:VCALENDAR