Perturbative Calculations for Light Quark-Flavour Physics

by Martin Gorbahn (Liverpool U.)

Monday 3 Jun 2024, 16:00 → 17:00 Europe/Berlin

ENC-D308

Flavour changing processes of light quarks test the Standard Model and

its extensions. The measurement of charged current processes provides

an electroweak precision test of the Standard Model through the

unitarity of the CKM matrix, while flavour changing neutral currents

are sensitive to flavour and CP violating new physics at very high

scales. Progress in calculations that interface non-perturbative

Lattice methods and perturbation theory allows for ever tighter

constraints on physics beyond the standard model. In this talk, I will

discuss these perturbative calculations and schemes conversions to the

the Lattice. I will discuss the extraction of $V_{ud}$ and $V_{us}$

from charged current processes and also present calculations that

improve the Standard Model predictions for $\varepsilon_K$ and $K \to \pi \bar{\nu} \nu$.