Lepton polarization asymmetry and forward–backward asymmetry in exclusive B→K1τ+τ- decay in universal extra dimension scenario |
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| Authors: | Asif Saddique M. Jamil Aslam Cai-Dian Lü |
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| Affiliation: | (1) Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan;(2) National Centre for Physics, Islamabad, Pakistan;(3) Institute of High Energy Physic, P.O. Box 918(4), Beijing, 100049, P.R. China;(4) Department of Physics, COMSATS Institute of Information Technology, Chak Shahzad Campus, Islamabad, Pakistan |
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| Abstract: | Decay rate, forward–backward asymmetry and polarization asymmetries of the final state leptons in B→K1τ+τ-, where K1 is the axial vector meson, are calculated in the standard model and in the universal extra dimension (UED) model. The sensitivity
of the observables to the compactification radius R, the only unknown parameter in the UED model, is studied. Finally, the
helicity fractions of the final state K1 are calculated and their dependence on the compactification radius is discussed. This analysis of the helicity fraction is
briefly extended to B→K*ℓ+ℓ- (ℓ=e,μ) and compared with the other approaches existing in the literature. |
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