Towards New Frontiers in CP Violation in B Decays

TL;DR

This paper reviews CP violation in B meson decays, discussing current experimental data, theoretical uncertainties, and future prospects for detecting new physics through precise measurements of decay phases and related processes.

Contribution

It highlights the importance of understanding hadronic uncertainties and U-spin symmetry in interpreting CP violation measurements in B decays, proposing directions for future research.

Findings

Current LHC data constrains CP violation in B decays

Hadronic uncertainties impact phase measurements

Future studies can reveal new sources of CP violation

Abstract

CP-violating effects in decays of B mesons offer a wide spectrum of probes for testing the phase structure of the quark-flavour sector of the Standard Model. After a brief discussion of the picture emerging from the current LHC data, the focus will be put on two specific topics: hadronic uncertainties from penguin topologies on measurements of the $B^0_q$-$\bar B^0_q$ mixing phases ($q\in\{d,s\}$), and the U-spin-related decays $B^0_s\to K^+K^-$ and $B^0_d\to\pi^+\pi^-$. Valuable new insights are expected from future studies of CP violation in B decays. For the detection of possible new sources of CP violation, it will be crucial to match the experimental and theoretical precisions and to have a careful look at the underlying assumptions.