Abstract
We report an indirect search for nonstandard model physics using the flavor-changing neutral current decays . We reconstruct the decays and measure their angular distributions, as a function of , where is the dimuon mass, in collisions at using a data sample corresponding to an integrated luminosity of . The transverse polarization asymmetry and the time-reversal-odd charge-and-parity asymmetry are measured for the first time, together with the longitudinal polarization fraction and the muon forward-backward asymmetry for the decays and . The forward-backward asymmetry in the most sensitive kinematic regime, , is measured to be , the most precise result to date. No deviations from the standard model predictions are observed.
- Received 2 August 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.081807
© 2012 American Physical Society