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Journal Articles Journal of High Energy Physics Year : 2014

Angular analysis of charged and neutral $B \to K \mu^+\mu^-$ decays

R. Aaij
  • Function : Author
J. He
J. Cogan
O. Leroy
J. Serrano


The angular distributions of the rare decays $B^+ \to K^+\mu^+\mu^-$ and $B^0 \to K^0_{\rm\scriptscriptstyle S}\mu^+\mu^-$ are studied with data corresponding to 3$~$fb$^{-1}$ of integrated luminosity, collected in proton-proton collisions at 7 and 8$~$TeV centre-of-mass energies with the LHCb detector. The angular distribution is described by two parameters, $F_{\rm H}$ and the forward-backward asymmetry of the dimuon system $A_{\rm FB}$, which are determined in bins of the dimuon mass squared. The parameter $F_{\rm H}$ is a measure of the contribution from (pseudo)scalar and tensor amplitudes to the decay width. The measurements of $A_{\rm FB}$ and $F_{\rm H}$ reported here are the most precise to date and are compatible with predictions from the Standard Model.

Dates and versions

in2p3-00968630 , version 1 (01-04-2014)



R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Angular analysis of charged and neutral $B \to K \mu^+\mu^-$ decays. Journal of High Energy Physics, 2014, 5, pp.082. ⟨10.1007/JHEP05(2014)082⟩. ⟨in2p3-00968630⟩
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