Mixing and $CP$ violation results in $b$-hadron decays at LHCb

TL;DR

This paper presents recent measurements of mixing and CP violation in b-hadron decays at LHCb, providing new insights and more precise determinations of key parameters that test the Standard Model and probe for new physics.

Contribution

It reports the first measurement of the CP violating phase φ_s above the φ(1020) resonance and updates several key parameters in b-hadron decay processes.

Findings

First measurement of φ_s above φ(1020) resonance

Determination of B_s^0 lifetime using semileptonic decays

Updated measurements of CKM angle γ

Abstract

Measurements of mixing and $CP$ violation in $b$-hadron decays are great probes to search for physics beyond the Standard Model. A selection of recent results based upon $3.0\ \mathrm{fb}^{-1}$ of LHCb data are presented. These are the first measurement of the $CP$ violating phase $\phi_{s}$ using $B_{s}^{0}\to J/\psi K^{+}K^{-}$ in the mass region above the $\phi(1020)$ resonance and $B_{s}^{0}\to \psi(2S) \phi$ decays, the determination of $B_{s}^{0}$ lifetime using $B_{s}^{0}\to D^{(*)-}\mu^{+}\nu_{\mu}$ decays, the updated measurements of the CKM angle $\gamma$ with $B^{\pm}\to D K^{*\pm}$ and $B_{s}^{0} \to D_{s}^{\mp}K^{\pm}$ decay modes and the CP violation searches in $\varLambda^{0}_{b}\to p\pi^{-}\pi^{+}\pi^{-}$ and $\varLambda^{0}_{b}\to pK^{-}\mu^{+}\mu^{-}$ decays.