Quark Flavor Physics Review

TL;DR

This review summarizes recent progress in lattice-QCD calculations for quark flavor physics, highlighting new physical-mass ensembles, FLAG-2 averages, and advances in meson decay constants, form factors, and mixing matrix elements.

Contribution

It provides an overview of recent lattice-QCD developments, including physical-mass ensembles and FLAG-2 averages, enhancing precision in quark flavor physics calculations.

Findings

Availability of physical-mass ensembles improves calculation accuracy.

FLAG-2 provides standardized averages for relevant quantities.

Progress in understanding nonleptonic K decay and long-distance effects.

Abstract

I review the status of lattice-QCD calculations relevant to quark flavor physics. The recent availability of physical-mass ensembles with large physical volumes generated by a growing number of lattice collaborations is an exciting development and I discuss their impact on the landscape of lattice flavor physics calculations. The activities of the newly formed FLAG-2 collaboration which provides averages of quantities calculated in lattice QCD that are relevant for quark flavor physics are also discussed. My talk covers (a subset of) the same quantities reviewed by FLAG-2, including results for $K$, $D_{(s)}$, and $B_{(s)}$ meson decay constants and semileptonic decay form factors, as well as for hadronic matrix elements of neutral ($K$, $D$, and $B_{(s)}$) meson mixing. I also briefly discuss recent progress towards understanding nonleptonic $K$ decay and long-distance contributions to $\Delta m_K$.