Analysis of the B --> π\ell^+ \ell^- Decay in the Standard Model with Fourth Generation

Abstract

We investigate the influence of the fourth generation quarks on the branching ratio and the CP-asymmetry in B -->π\ell^+ \ell^- decay. Taking the |V_{t'd}V_{t'b}| ~ 0.001 with phase about 10 degree, which is consistent with the sin2ϕ_1 of the CKM and the B_d mixing parameter Δm_{B_d}, we obtain that for both muon and tau channels the branching ratio, the magnitude of CP-asymmetry and lepton polarization depict strong dependency on the 4th generation quarks mass and mixing parameters. These results can serve as a good tool to search for new physics effects, precisely, to search for the fourth generation quarks($t^{\prime },b^{\prime })$ via its indirect manifestations in loop diagrams.

arXiv comment17 pages, 8 figures

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Cited by in corpus (2)

• Exclusive $B \rar ρ\ell^+ \ell^-$ Decay in the Standard Model with Fourth--Generation
• Double-Lepton Polarization Asymmetries in $B_s \rar ϕ\ell^+ \ell^-$ Decay in the Fourth-Generation Standard Model