Document Type
Article
Publication Date
2-24-2012
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=Mμμ2c2, where M μμ is the dimuon mass, in pp̄ collisions at √s=1.96TeV using a data sample corresponding to an integrated luminosity of 6.8fb -1. The transverse polarization asymmetry AT(2) and the time-reversal-odd charge-and-parity asymmetry A im are measured for the first time, together with the K * longitudinal polarization fraction F L and the muon forward-backward asymmetry A FB 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<6GeV2/c2, is measured to be A FB=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. © 2012 American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Recommended Citation
Aaltonen, T., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Auerbach, B., Aurisano, A., Azfar, F., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Barria, P., Bartos, P., Bauce, M., Bauer, G., Bedeschi, F., Beecher, D., & Behari, S. (2012). Measurements of the angular distributions in the decays B→K( *)μ +μ - at CDF. Physical Review Letters, 108 (8) https://doi.org/10.1103/PhysRevLett.108.081807