Fourth generation effects in rare (B_s -> l^+ l^-) and (B_s -> l^+ l^- gamma) decays

Details Fourth generation effects in rare (B_s -> l^+ l^-) and (B_s -> l^+ l^- gamma) decays Fourth generation effects in rare (B_s -> l^+ l^-) and (B_s -> l^+ l^- gamma) decays

2001-06-26

arxiv.org/abs/hep-ph/0106288v3

Eur.Phys.J.C27:405-410,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pp, 7 figures (postscript formatted), LaTex formatted

Scientific paper

10.1140/epjc/s2002-01110-6

The contribution of the fourth generation quarks to the rare (B_s -> l^+ l^-) and (B_s -> l^+ l^- gamma) decays are studied. Constraints on the extended Cabibbo-Kobayashi-Maskawa matrix elements |V_{tb} V_{ts}*| and |V_{t'b} V_{t's}*| are obtained from the existing experimental result for the branching ratio of the (B -> X_s gamma) decay. The branching ratios of the above-mentioned decays, as well as the photon spectrum in the (B_s -> l^+ l^- gamma) decay, are studied. It is found that the results are sensitive to the existence of the fourth generation.

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