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Measurements of the angular distributions in the decays B?K( ^*)µ ⁺µ ^- at CDF

Abstract: We report an indirect search for nonstandard model physics using the flavor-changing neutral current decays B ! KðÞþ. We reconstruct the decays and measure their angular distributions, as a function of q2 ¼ M2 c2, where M is the dimuon mass, in pp collisions at ffiffis p ¼ 1:96 TeV using a data sample corresponding to an integrated luminosity of 6:8 fb1. The transverse polarization asymmetry Að2ÞT 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 ! K0þ and Bþ ! Kþþ. The B ! Kþ forward-backward asymmetry in the most sensitive kinematic regime, 1 q2 < 6 GeV2=c2, is measured to be AFB ¼ 0:29þ0:20 0:23ðstatÞ 0:07ðsystÞ, the most precise result to date. No deviations from the standard model predictions are observed.

Autoría: Aaltonen T., Álvarez González B., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Apresyan A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bauer G., Bedeschi F., Beecher D., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Binkley M.,

Fuente: Physical Review Letters, 2012, 108(8), 081807

Editorial: American Physical Society

Fecha de publicación: 01/02/2012

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

DOI: 10.1103/PhysRevLett.108.081807

ISSN: 0031-9007,1079-7114

Url de la publicación: https://doi.org/10.1103/PhysRevLett.108.081807

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