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Measurements of the Angular Distributions in the Decays B -> K(*)μ+μ at CDF

ContributorsCDF Collaboration
Published inPhysical review letters, vol. 108, no. 08, 081807
Publication date2012
Abstract

We report an indirect search for nonstandard model physics using the flavor-changing neutral current decays B→K(*)μ+μ−. We reconstruct the decays and measure their angular distributions, as a function of q2=M2μμc2, where Mμμ is the dimuon mass, in pp collisions at s√=1.96  TeV using a data sample corresponding to an integrated luminosity of 6.8  fb−1. The transverse polarization asymmetry A(2)T and the time-reversal-odd charge-and-parity asymmetry Aim are measured for the first time, together with the K∗ longitudinal polarization fraction FL and the muon forward-backward asymmetry AFB for the decays B0→K*0μ+μ− and B+→K*+μ+μ−. The B→K∗μ+μ− forward-backward asymmetry in the most sensitive kinematic regime, 1≤q2<6  GeV2/c2, is measured to be AFB=0.29+0.20−0.23(stat)±0.07(syst), the most precise result to date. No deviations from the standard model predictions are observed.

Citation (ISO format)
CDF Collaboration. Measurements of the Angular Distributions in the Decays <em>B -&gt; K<sup>(*)</sup>μ<sup>+</sup>μ<sup>−</sup></em> at CDF. In: Physical review letters, 2012, vol. 108, n° 08, p. 081807. doi: 10.1103/PhysRevLett.108.081807
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