CP violation in polarized B-> pi ell+ ell- and B-> rho ell+ ell- decays

Details CP violation in polarized B-> pi ell+ ell- and B-> rho ell+ ell- decays CP violation in polarized B-> pi ell+ ell- and B-> rho ell+ ell- decays

2004-08-17

arxiv.org/abs/hep-ph/0408186v2

Eur.Phys.J.C41:189-198,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 10 figures; minor errors and misprints corrected, references added, version to be published in EPJC

Scientific paper

10.1140/epjc/s2005-02197-9

We study the decay rate and the CP violating asymmetry of the exclusive B-> pi ell+ ell- and B-> rho ell+ ell- decays in the case where one of the final leptons is polarized. We calculate the contributions coming from the individual polarization states in order to identify a so-called wrong sign decay, which is a decay with a given polarization, whose width and CP asymmetry are smaller as compared to the unpolarized one. The results are presented for electron and tau leptons. We observe that in particular decay channels, one can identify a wrong sign decay which is more sensitive to new physics beyond the Standard Model.

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