# Differential branching fractions and isospin asymmetries of $B \to K^{*}\mu^{+}\mu^{-}$ decays

Abstract : The isospin asymmetries of $B \to K\mu^+\mu^-$ and $B \to K^{*}\mu^+\mu^-$ decays and the partial branching fractions of the $B^0 \to K^0\mu^+\mu^-$, $B^+ \to K^+\mu^+\mu^-$ and $B^+ \to K^{*+}\mu^+\mu^-$ decays are measured as functions of the dimuon mass squared, $q^2$. The data used correspond to an integrated luminosity of 3~fb$^{-1}$ from proton-proton collisions collected with the LHCb detector at centre-of-mass energies of 7\,TeV and 8\,TeV in 2011 and 2012, respectively. The isospin asymmetries are both consistent with the Standard Model expectations. The three measured branching fractions, while individually consistent, all favour lower values than their respective Standard Model predictions.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00968629
Contributor : Sabine Starita <>
Submitted on : Tuesday, April 1, 2014 - 11:58:31 AM
Last modification on : Tuesday, April 20, 2021 - 12:00:12 PM

### Citation

R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Differential branching fractions and isospin asymmetries of $B \to K^{*}\mu^{+}\mu^{-}$ decays. Journal of High Energy Physics, Springer, 2014, 06, pp.133. ⟨10.1007/JHEP06(2014)133⟩. ⟨in2p3-00968629⟩

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