Measurement of $CP$ asymmetries in the decays $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ and $B^{+}\to K^{+}{\mu }^{+}{\mu }^{-}$

Abstract

The direct $CP$ asymmetries of the decays $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ and $B^{+}\to K^{+}{\mu }^{+}{\mu }^{-}$ are measured using $pp$ collision data corresponding to an integrated luminosity of 3.0$\mbox{fb}^{-1}$ collected with the LHCb detector. The respective control modes $B^0\to J/\psi K^{\ast 0}$ and $B^{+}\to J/\psi K^{+}$ are used to account for detection and production asymmetries. The measurements are made in several intervals of ${\mu }^{+}{\mu }^{-}$ invariant mass squared, with the $\varphi (1020)$ and charmonium resonance regions excluded. Under the hypothesis of zero $CP$ asymmetry in the control modes, the average values of the asymmetries are \begin{align} {\cal A}_{C\!P}(B^0 \rightarrow K^{*0} μ^+ μ^-) &= -0.035 \pm 0.024 \pm 0.003, \cr {\cal A}_{C\!P}(B^+ \rightarrow K^{+} μ^+ μ^-) &= \phantom{-}0.012 \pm 0.017 \pm 0.001, \end{align} where the first uncertainties are statistical and the second are due to systematic effects. Both measurements are consistent with the Standard Model prediction of small $CP$ asymmetry in these decays.

19 pages including author list, 4 figures

References in corpus (5)

• PYTHIA 6.4 Physics and Manual
• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• Differential branching fractions and isospin asymmetries of $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays
• Mass distributions marginalized over per-event errors
• Angular analysis of charged and neutral $B\to K{\mu }^{+}{\mu }^{-}$ decays

Cited by in corpus (23)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Review of Lepton Universality tests in B decays
• Rare $B$ Decays as Tests of the Standard Model
• Hadronic and New Physics Contributions to $b\to s$ Transitions
• Measurement of the phase difference between short- and long-distance amplitudes in the $B^{+}\to K^{+}{\mu }^{+}{\mu }^{-}$ decay
• Measurement of the semileptonic $CP$ asymmetry in $B^0-\overline{B}{}^0$ mixing
• Flavor Anomalies in Heavy Quark Decays
• Time dependence in $B\to V\ell \ell$ decays
• Measurement of the $CP$ asymmetry in $B_s^0-\overline{B}{}_s^0$ mixing
• CP violation in the B system
• Rare b hadron decays at the LHC
• Observation of the decay ${\Lambda }_b^0\to p{K}^{-}{\mu }^{+}{\mu }^{-}$ and a search for $CP$ violation
• Enhanced CP asymmetries in $B\to K{\mu }^{+}{\mu }^{-}$
• $CP$ violation in $b\to s\ell \ell$: a model independent analysis
• $B\to K^{\ast }$ Transition Form Factors and the Semi-leptonic Decay $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$
• Measurement of $CP$ asymmetries in $D^{\pm }\to {\eta }^{\prime }{\pi }^{\pm }$ and $D_s^{\pm }\to {\eta }^{\prime }{\pi }^{\pm }$ decays
• Electroweak Penguin Decays of $b$-Flavoured Hadrons
• Rare decays of b hadrons
• ${\Lambda }_b\to \Lambda (\to p{\pi }^{-}){\ell }^{+}{\ell }^{-}$ as probe of CP-violating New Physics
• Recent progress in decays of $b$ and $c$ hadrons
• Tensions in the flavour sector