The angular distribution of the flavor-changing neutral current decay $B^{+}\to K^{+}{\mu }^{+}{\mu }^{-}$ is studied in proton-proton collisions at a center-of-mass energy of 8 TeV. The analysis is based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of $20.5{\mathrm{fb}}^{-1}$. The forward-backward asymmetry $A_{\mathrm{FB}}$ of the dimuon system and the contribution $F_{\mathrm{H}}$ from the pseudoscalar, scalar, and tensor amplitudes to the decay width are measured as a function of the dimuon mass squared. The measurements are consistent with the standard model expectations.

• Received 2 June 2018

DOI:https://doi.org/10.1103/PhysRevD.98.112011

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© 2018 CERN, for the CMS Collaboration