Rare B Decays at CMS

Abstract

The flavour changing neutral current decays can be interesting probes for searching for New Physics. Angular distributions of the decay ${\mathrm{B}}^0\to {\mathrm{K}}^{\ast 0}{\mu }^{+}{\mu }^{-}$ are studied using a sample of proton-proton collisions at $\sqrt{s}=8\mathrm{TeV}$ collected with the CMS detector at the LHC, corresponding to an integrated luminosity of $20.5{\mathrm{fb}}^{-1}$. An angular analysis is performed to determine $P_1$ and $P_5^{\prime }$, where $P_5^{\prime }$ is of particular interest due to recent measurements that indicate a potential discrepancy with the standard model. Based on a sample of 1397 signal events, $P_1$ and $P_5^{\prime }$ angular parameters are determined as a function of the dimuon invariant mass squared. The measurements are in agreement with standard model predictions.

7 pages, 3 figures, LHCP2017