# B-physics through three-flavour lattice QCD with Wilson quarks

#### B-physics through three-flavour lattice QCD with Wilson quarks

- Event time: 2:00pm until 3:00pm
- Event date: 8th March 2023
- Speaker: Jochen Heitger (Westfaelische Wilhelms-Universitaet Muenster)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) (James Clerk Maxwell Building (JCMB)) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

In heavy flavour phenomenology, the B-meson sector continues

to be a promising realm for precision tests of the Standard Model,

where evidence of New Physics can be expected. Lattice QCD offers

a powerful ab initio framework to reliably calculate the low-energy

hadronic matrix elements involved and thus to significantly reduce

the uncertainties of the theory inputs to such tests.

This talk discusses approaches to lattice B-physics that are based

on non-perturbative Heavy Quark Effective Theory (HQET) and step

scaling strategies. In particular, I will report on implementing a

suitable finite-volume matching procedure, to fix the parameters of

the effective theory, by numerical simulations with three flavours

of O($a$) improved Wilson quarks and how these HQET parameters can

be related to large-volume computations on (2+1)-flavour ensembles

to extract physical quantities. As another example, a precision

determination of the $B^*B\pi$ coupling in the limit of static

heavy and chiral light quarks is presented.

### About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..