The effects of the fourth generation on the double-lepton polarization in the B -> Kl(+) l(-) decay

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BASHIRY V., Zebarjad S. M., Falahati F., Azizi K.

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, vol.35, no.6, 2008 (SCI-Expanded) identifier identifier


This study investigates the influence of fourth-generation quarks on double-lepton polarizations in the B -> Kl(+) l(-) decay. Taking vertical bar Vt'sVt'b vertical bar similar to {0.01 - 0.03} with a phase of about 100 degrees, which is consistent with the b -> sl(+) l(-) rate and the B-s mixing parameter Delta m B-s, we have found out that double-lepton (mu, tau) polarizations are quite sensitive to the existence of the fourth generation. It can serve as an efficient tool to search for new physics effects, precisely to an indirect search for the fourth-generation quarks (t', b').