Constraint on compactification scale via recently observed baryonic ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ channel and analysis of the ${\Sigma }_b\to \Sigma {\ell }^{+}{\ell }^{-}$ transition in SM and UED scenario

Abstract

We obtain a lower limit on the compactification scale of extra dimension via comparison of the branching ratio in the baryonic ${\Lambda }_b\to \Lambda {\mu }^{+}{\mu }^{-}$ decay channel recently measured by CDF collaboration and our previous theoretical study. We also use the newly available form factors calculated via light cone QCD sum rules in full theory to analyze the flavour changing neutral current process of the ${\Sigma }_b\to \Sigma {\ell }^{+}{\ell }^{-}$ in universal extra dimension scenario in the presence of a single extra compact dimension. We calculate various physical quantities like branching ratio, forward-backward asymmetry, baryon polarizations and double lepton polarization asymmetries defining the decay channel under consideration. We also compare the obtained predictions with those of the standard model.

32 Pages, 27 Figures and one Table

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Cited by in corpus (4)

• Study of Bc-> D_s^* \ell^+ \ell^- in Single Universal Extra Dimension
• Semi-leptonic $B\to S$ decays in the standard model and in the universal extra dimension model
• Analysis of the radiative ${\Lambda }_b\to \Lambda \gamma$ transition in SM and scenarios with one or two universal extra dimensions
• Effects of a Single Universal Extra Dimension in $B_c\to (D_s,D){\ell }^{+}{\ell }^{-}$ Decays