Semileptonic B to Scalar meson Decays in the Standard Model with Fourth Generation

Abstract

We study the effects of the fourth generation of quarks on the total branching ratio and the lepton polarizations in ${\bar{B}}_0\to K_0^{\ast }(1430)l^{+}{l}^{-}$($l$ = $\mu$, $\tau$) decay. Taking fourth generation quark mass $m_{t\prime }$ of about $400$ to $600$ GeV with the mixing angle $|V_{t^{\prime }b}^{\ast }{V}_{t^{\prime }s}|$ in the range $(0.05-1.4)\times 10^{-2}$ and using the phase to be $80^o$%, it is found that the branching ratio and lepton polarizations are quite sensitive to these fourth generation parameters. In future the experimental study of this decay will give us an opportunity to study new physics effects, precisely, to search for the fourth generation of quarks in an indirect way.

15 pages, 7 figures; Modification in the text and figures, version is closed to the one accepted for publication in Phys. Rev. D

References in corpus (10)

• Possible Indications of New Physics in Bd-mixing and in sin(2 beta) Determinations
• Precision Constraints on Extra Fermion Generations
• Large Time-dependent CP Violation in B_s^0 System and Finite D^0-D^0bar Mass Difference in Four Generation Standard Mode
• Patterns of Flavour Violation in the Presence of a Fourth Generation of Quarks and Leptons
• Scalar mesons in weak semileptonic decays of $B_{(s)}$
• (Lambda_b -> Lambda l^+ l^-) decay in universal extra dimensions
• Perturbativity and a Fourth Generation in the MSSM
• Double Lepton Polarization in ${\Lambda }_b-->\Lambda l^{+}{l}^{-}$ Decay in the Standard Model with Fourth Generations Scenario
• An improved observable for the forward-backward asymmetry in B -> K* l+ l- and Bs -> phi l+ l-
• Analysis of Various Polarization Asymmetries In The Inclusive $b\to s{\ell }^{+}{\ell }^{-}$ Decay In The Fourth-Generation Standard Model