Lepton polarization asymmetry and forward backward asymmetry in exclusive B->K_1 tau^(+)tau^(-) decay in universal extra dimension scenario

Abstract

Decay rate, forward-backward asymmetry and polarization asymmetries of final state leptons in B-> K_{1}tau ^{+}tau ^{-}, where K_{1} is the axial vector meson, are calculated in Standard Model and in the universal extra dimension (UED) model. The sensitivity of the observables on the compactification radius $R$, the only unknown paramter in UED model, is studied. Finally, the helicity fractions of the final state K_{1} are calculated and their dependence on the compactification radius is discussed. This analysis of helicity fraction is briefly extended to B->K^{*}l ^{+}l ^{-}(l =e,mu) and compared with the other approaches exist in the literature

19 pages, 6 figures

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• Investigation of the ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ transition in universal extra dimension using form factors from full QCD
• Lepton polarization in $B\to K_1{\ell }^{+}{\ell }^{-}$ Decays
• Branching Ratios, Forward-backward Asymmetry and Angular Distributions of $B\to K_1{l}^{+}{l}^{-}$ Decays
• Model Independent Analysis of the Forward-Backward Asymmetry for the $B\to K_1{\mu }^{+}{\mu }^{-}$ Decay
• Imprints of CP violation asymmetries in rare ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ decay in family non-universal $Z^{\prime }$ model
• Study of Bc-> D_s^* \ell^+ \ell^- in Single Universal Extra Dimension