HAL : in2p3-00653549, version 1
 arXiv : 1112.3515
 Physical Review Letters 108 (2012) 181806
 Differential branching fraction and angular analysis of the decay $\boldsymbol{B^{0} \rightarrow K^{*0} \mu^+ \mu^-}$
 LHCb Collaboration(s)
 (2012)
 The angular distributions and the partial branching fraction of the decay $B^{0} \rightarrow K^{*0} \mu^+ \mu^-$ are studied using an integrated luminosity of $0.37\,fb^{-1}$ of data collected with the LHCb detector. The forward-backward asymmetry of the muons, $A_{\mathrm{FB}}$, the fraction of longitudinal polarisation, $F_{\mathrm{L}}$, and the partial branching fraction, $\mathrm{d}{\mathcal B}/\mathrm{d}q^{2}$, are determined as a function of the dimuon invariant mass. The measurements are in good agreement with the Standard Model predictions and are the most precise to date. In the dimuon invariant mass squared range $1.00-6.00{\mathrm{\,Ge\kern -0.1em V}}^2/c^4$, the results are $A_{\mathrm{FB}}=-0.06\,^{+0.13}_{-0.14} \pm 0.04$, $F_{\mathrm{L}}=0.55\pm 0.10\pm 0.03$ and $\mathrm{d}{\mathcal B}/\mathrm{d}q^{2}=(0.42 \pm 0.06\pm 0.03) \times 10^{-7}c^4/{\mathrm{\,Ge\kern -0.1em V}}^2$. In each case, the first error is statistical and the second systematic.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1112.3515
 in2p3-00653549, version 1 http://hal.in2p3.fr/in2p3-00653549 oai:hal.in2p3.fr:in2p3-00653549 Contributeur : Nicole Berger <> Soumis le : Lundi 19 Décembre 2011, 16:42:10 Dernière modification le : Mercredi 9 Mai 2012, 15:44:24