FCNC $B_s$ and ${\Lambda }_b$ transitions: Standard Model versus a single Universal Extra Dimension scenario

Abstract

We study the FCNC $B_s\to \varphi \gamma ,\varphi \nu \bar{\nu }$ and ${\Lambda }_b\to \Lambda \gamma ,\Lambda \nu \bar{\nu }$ transitions in the Standard Model and in a scenario with a single Universal Extra Dimension. In particular, we focus on the present knowledge of the hadronic uncertainties and on possible improvements. We discuss how the measurements of these modes can be used to constrain the new parameter involved in the extra dimensional scenario, the radius $R$ of the extra dimension, completing the information available from B-factories. The rates of these $b\to s$ induced decays are within the reach of new experiments, such as LHCb.

LaTex, 8 pages, 7 eps figures. Version to be published in Physical Review D

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Cited by in corpus (11)

• Rare baryon decays Lambda_b -> Lambda l+ l- (l=e, mu, tau) and Lambda_b -> Lambda gamma : Differential and total rates, lepton- and hadron-side forward-backward asymmetries
• $B_s\to f_0(980)$ form factors and $B_s$ decays into $f_0(980)$
• Rare decays of ${\Lambda }_b\to \Lambda \gamma$ and ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ in universal extra dimension model
• Search for $B_s^0\to \gamma \gamma$ and a measurement of the branching fraction for $B_s^0\to \varphi \gamma$
• Rare $B_s$ decays to $\eta$ and ${\eta }^{\prime }$ final states
• Investigation of the ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ transition in universal extra dimension using form factors from full QCD
• Double-Lepton Polarization Asymmetries and Branching Ratio in $B \rar K_{0}^{*}(1430) l^+ l^- $ transition from Universal Extra Dimension Model
• Study of Bc-> D_s^* \ell^+ \ell^- in Single Universal Extra Dimension
• $B_s\to f_0(980)$ decays: Results from light-cone QCD Sum Rules
• Probing Universal Extra Dimensions through rare decays induced by $b\to s$ transition
• $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ as a probe of Universal Extra Dimensions