CP Violation in $B$ Decays (and the Search for New Physics)

Abstract

In this talk, I review the various measurements that have been made over the years of CP-violating observables in $B$ decays. These include indirect CP asymmetries, direct CP asymmetries, and triple products. All are discussed in the context of the search for new physics (NP). The only hints of NP have appeared in (i) $B\to \pi K$ decays and (ii) 3-body $B\to K\pi \pi$ and $B\to K\bar{K}K$ decays, where the extracted (loop-level) value of $\gamma$ may differ from the value found using (tree-level) $B^{+}\to D^{(\ast )}{K}^{(\ast )+}$ decays. CP-violating observables may also be used to distinguish among the models proposed to explain the current anomalies observed in $b\to s{\mu }^{+}{\mu }^{-}$ and $b\to c\tau {\bar{\nu }}_{\tau }$ decays.

arXiv commentTalk given at FPCP2020. 8 pages, 2 figures

References in corpus (25)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Determining $\gamma$ using $B^{\pm }\to D{K}^{\pm }$ with multibody D decays
• Decays of $B$ Mesons to Two Light Pseudoscalars
• Determination of the Weak Phase gamma from Rate Measurements in B^+- -> pi K, pi pi Decays
• Measuring the CP Angle βin Hadronic b\to s Penguin Decays
• New Bound on gamma from B^+- -> pi K Decays
• Triple-Product Correlations in B -> V1 V2$ Decays and New Physics
• Measurement of CP violation in the phase space of $B^{\pm }\to K^{+}{K}^{-}{\pi }^{\pm }$ and $B^{\pm }\to {\pi }^{+}{\pi }^{-}{\pi }^{\pm }$ decays
• Branching Fractions and Direct CP Violation in Charmless Three-body Decays of B Mesons
• Evidence for Direct CP Violation from Dalitz-plot analysis of B+/- -> K+/- pi+/- pi-/+
• Direct CP Violation in Charmless Three-body Decays of $B$ Mesons
• Triple product asymmetries in K, D_(s) and B_(s) decays
• CP asymmetries in three-body B+- decays to charged pions and kaons
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$: Distinguishing Models through CP-Violating Effects
• Direct CP asymmetries of three-body $B$ decays in perturbative QCD
• CP violation and CPT invariance in B+- decays with final state interactions
• Time-dependent amplitude analysis of B0 --> K0S pi+ pi-
• U-spin analysis of CP violation in $B^{-}$ decays into three charged light pseudoscalar mesons
• Charmless B -> PPP Decays: the Fully-Symmetric Final State
• Diagrammatic Analysis of Charmless Three-Body B Decays
• Searching for New Physics with bbar -> sbar Bs -> V_1 V_2 Penguin Decays
• Measuring gamma with B -> K pi pi and B -> K K Kbar Decays
• Extraction of the CP-violating phase $\gamma$ using $B\to K\pi \pi$ and $B\to KK\bar{K}$ decays
• Measuring gamma in B -> K pi pi Decays
• Extraction of the CKM phase $\gamma$ using charmless 3-body decays of $B$ mesons