“Mini topical afternoon on flavor dynamics and new physycs”

by Christopher Sachrajda (University of Southampton), Marcello Rotondo (LNF)

Monday 15 Apr 2024, 14:30 → 17:00 Europe/Rome

Aula Conversi (Dipartimento di Fisica - Ed.G.Marconi)

Christopher Sachrajda

Extending the Range and Precision of Lattice Flavourdynamics

Precision Flavour Physics is a very powerful tool for exploring the limits of the Standard Model and in searches for New Physics. The precision of theoretical predictions for physical quantities is generally limited by our ability to evaluate the hadronic effects sufficiently accurately. In recent years, progress in Lattice QCD has improved to allow us to evaluate these non-pertubative effects for several quantities, such as leptonic decay constants and semileptonic form factors, at the percent level or better, requiring the introduction of isospin breaking corrections, and in particular QED effects, to make further progress. In order to apply Lattice QCD to other processes new theoretical methods are being developed. I will briefly review the status and prospects for these new developments, with illustrations including \epsilon_K, K \to \pi \pi decays and B_s \to \mu+ \mu- \gamma decays and I will discuss prospects for applying Lattice QCD to B_s \to K \mu+ \mu- decays.
Much of the work that I will be reviewing has been done in collaboration with colleagues from Rome. 

 

Marcello Rotondo 

 

B-hadron semileptonic and rare decays: a laboratory for challenging the Standard Model

 

The decays of b-hadrons provide a useful tool for testing the Standard Model and restricting various New Physics scenarios. 

Recent measurements carried out at LHCb and B-Factories have revealed anomalies in semileptonic and rare b-hadron decays, 

which require further investigation. High-precision measurements from LHCb and Belle II depend heavily on theoretical inputs 

for both the interpretation of results and the estimation of key parameters through data fitting. I will provide an overview of the 

current status and future developments of some of these measurements, with a focus on experimental aspects that require 

theoretical insight from Lattice QCD. Furthermore, I will briefly discuss the impact of QED corrections and their handling

in current measurements.