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

Abstract : 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.
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http://hal.in2p3.fr/in2p3-00968630
Contributor : Sabine Starita <>
Submitted on : Tuesday, April 1, 2014 - 12:01:24 PM
Last modification on : Friday, November 20, 2020 - 3:30:14 PM

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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, Springer, 2014, 5, pp.082. ⟨10.1007/JHEP05(2014)082⟩. ⟨in2p3-00968630⟩

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