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

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 ${\varphi }_s$ using $B_s^0\to J/\psi K^{+}{K}^{-}$ in the mass region above the $\varphi (1020)$ resonance and $B_s^0\to \psi (2S)\varphi$ decays, the determination of $B_s^0$ lifetime using $B_s^0\to D^{(\ast )-}{\mu }^{+}{\nu }_{\mu }$ decays, the updated measurements of the CKM angle $\gamma$ with $B^{\pm }\to D{K}^{\ast \pm }$ and $B_s^0\to D_s^{\mp }{K}^{\pm }$ decay modes and the CP violation searches in ${\Lambda }_b^0\to p{\pi }^{-}{\pi }^{+}{\pi }^{-}$ and ${\Lambda }_b^0\to p{K}^{-}{\mu }^{+}{\mu }^{-}$ decays.

7 pages, 3 figures, proceedings of the Fifth Annual Conference on Large Hadron Collider Physics, Shanghai Jiao Tong University, Shanghai, China, May 15-20, 2017

References in corpus (7)

• Current status of the Standard Model CKM fit and constraints on $\Delta F=2$ New Physics
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\overline{B}}_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays
• Measurement of the CKM angle $\gamma$ from a combination of LHCb results
• Direct CP violation in ${\Lambda }_b$ decays
• First study of the CP-violating phase and decay-width difference in $B_s^0\to \psi (2S)\varphi$ decays
• Measurement of the $B_s^0$ lifetime in the flavor-specific decay channel $B_s^0\to D_s^{-}{\mu }^{+}\nu X$
• Imprints of CP violation asymmetries in rare ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ decay in family non-universal $Z^{\prime }$ model