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=Mμμ2c2, where Mμμ is the dimuon mass, in pp̅ collisions at
√s=1.96 TeV using a data sample corresponding to an integrated
luminosity of 6.8 fb-1. The transverse polarization asymmetry AT(2)
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=0.29-0.23+0.20(stat)±0.07(syst), the most precise result to
date. No deviations from the standard model predictions are observed.
Return to top of page.
Go to Physics Results
Updated: Wednesday, 2012 February 29 09:22:10 CST automatically from input from Stephanie A Schuler