The Effects of Fourth Generation on the double Lepton Polarization in B \rar K \ell^+ \ell^- decay

Details The Effects of Fourth Generation on the double Lepton Polarization in B \rar K \ell^+ \ell^- decay The Effects of Fourth Generation on the double Lepton Polarization in B \rar K \ell^+ \ell^- decay

2007-10-13

arxiv.org/abs/0710.2619v3

J.Phys.G35:065005,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 27 figures

Scientific paper

10.1088/0954-3899/35/6/065005

This study investigates the influence of the fourth generation quarks on the double lepton polarizations in B \rar K \ell^+ \ell^- decay. Taking |V_{t's}V_{t'b}|\sim \{0.01-0.03\} with phase about 100^\circ, which is consistent with the b\to s\ell^+\ell^- rate and the B_s mixing parameter Delta m_{B_s}$, we obtain that the double lepton(muon and tau) polarizations are quite sensitive to the existence of fourth generation. It can serve as a good tool to search for new physics effects, precisely, to indirect search for the fourth generation quarks(t', b').

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