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Aaij, R.; Amhis, Y.; Barsuk, S.; Callot, O.; He, J.; Kochebina, O.; Lefrançois, J.; Machefert, F.; Martin Sanchez, A.; Nicol, M.; Robbe, P.; Schune, M.-H.; Teklishyn, M.; Viaud, B.; Ben-Haim, E.; Benayoun, M.; David, P.; del Buono, L.; Martens, A.; Milanes, D.A.; Polci, F.; Ajaltouni, Ziad Zj; Cogneras, E.; Deschamps, O.; El Rifai, I.; Grabalosa Gándara, M.; Henrard, Pierre; Hoballah, M.; Lefèvre, R.; Li Gioi, L.; Monteil, S.; Niess, V.; Perret, Pascal; Roa Romero, Diego Alejandro; de Bonis, I.; Decamp, D.; Ghez, Ph; Hopchev, P.; Lees, J.-P.; Machikhiliyan, I.V.; Minard, M.-N.; Pietrzyk, B.; Qian, W.; t'Jampens, S.; Tisserand, V.; Tournefier, E.; Adrover, C.; Aslanides, E.; Cogan, J.; Legac, R.; Leroy, O.; Mancinelli, G.; Maurice, E.; Perrin-Terrin, M.; Sapunov, M.; Serrano, J.; Tsaregorodtsev, A.
The journal of high energy physics, 2013, Letnik: 8Journal Article
The angular distribution and differential branching fraction of the decay $B^{0} \to K^{*0} \mu^{+}\mu^{-}$ are studied using a data sample, collected by the LHCb experiment in $pp$ collisions at $\sqrt{s}=7\,{\rm TeV}$, corresponding to an integrated luminosity of $1.0\,{\rm fb}^{-1}$. Several angular observables are measured in bins of the dimuon invariant mass squared, $q^{2}$. A first measurement of the zero-crossing point of the forward-backward asymmetry of the dimuon system is also presented. The zero-crossing point is measured to be $q_{0}^{2} = 4.9 \pm 0.9 \,{\rm GeV}^{2}/c^{4}$, where the uncertainty is the sum of statistical and systematic uncertainties. The results are consistent with the Standard Model predictions.
