Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-01-12
Phys.Rev.D84:035003,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 4 figures
Scientific paper
10.1103/PhysRevD.84.035003
Form factors parameterizing the semileptonic decay $B_{c}\rightarrow D_{s}^{\ast}l^{+}l^{-}$ ($l=\mu ,\tau $) are calculated using the frame work of Ward Identities. These form factors are then used to calculate the physical observables like branching ratio and helicity fractions of final state $D_{s}^{\ast}$ meson in these decay modes. The analysis is then extended to the the universal extra dimension (UED) model where the dependence of above mentioned physical variables to the compactification radius R, the only unknown parameter in UED model, is studied. It is shown that the helicity fractions of $D_{s}^{\ast}$ are quite sensitive to the UED model especially when have muons as the final state lepton. Therefore, these can serve as a useful tool to establish new physics predicted by the UED model.
Ahmed Ishtiaq
Aslam Jamil M.
Paracha Ali M.
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