Search for $CP$ violation in $B_s^0$ mixing at LHCb

Abstract

One of the main goals of the LHCb experiment is to determine the mixing-induced $CP$ violating phase ${\varphi }_s$ in $b\to c\bar{c}s$ transitions. Assuming the Standard Model, ${\varphi }_s$ is precisely predicted, hence new physics could easily affect the measurement. The most precise single measurement using $B_s^0\to J/\psi K^{+}{K}^{-}$ data collected in 2015 and 2016 is presented along with a total combined value including all LHCb ${\varphi }_s^{c\bar{c}s}$ analyses. The result is further combined with Tevatron and other LHC experimental results.

arXiv commentContribution to the 2019 EW session of the 54th Rencontres de Moriond

References in corpus (14)

• sPlot: a statistical tool to unfold data distributions
• Precision measurement of $CP$ violation in $B_s^0\to J/\psi K^{+}{K}^{-}$ decays
• Measurement of CP violation and the B_s^0 meson decay width difference with B_s^0\to J/ψK^+ K^- and B_s^0\to J/ψπ^+π^- decays
• Measurement of the CP-violating phase ${\varphi }_s^{J/\psi \varphi }$ using the flavor-tagged decay $B_s^0\to J/\psi \varphi$ in 8 fb${}^{-1}$ of $p \barp$ collisions
• Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\overline{B}}_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays
• Measurement of the CP-violating weak phase phi[s] and the decay width difference Delta Gamma[s] using the Bs to J/Psi phi(1020) decay channel in pp collisions at sqrt(s) = 8 TeV
• sFit: a method for background subtraction in maximum likelihood fit
• Updated measurement of time-dependent $CP$-violating observables in $B_s^0\to J/\psi K^{+}{K}^{-}$ decays
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\bar{B}}_s^0\to D_s^{+}{D}_s^{-}$ decays
• Flavour tagged time dependent angular analysis of the $B_s\to J/\psi \varphi$ decay and extraction of $\Delta \Gamma$ and the weak phase ${\varphi }_s$ in ATLAS
• First study of the CP-violating phase and decay-width difference in $B_s^0\to \psi (2S)\varphi$ decays
• Resonances and $CP$ violation in $B_s^0$ and ${\overline{B}}_s^0\to J/\psi K^{+}{K}^{-}$ decays in the mass region above the $\varphi (1020)$
• Measurement of the $CP$-violating phase ${\varphi }_s$ from $B_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays in 13 TeV $pp$ collisions