Signatures of new Physics in dileptonic B-decays

Abstract

Leptonic decays of $B$-mesons are theoretically very clean probes for testing the Standard Model (SM) and possible physics beyond it. Amongst the various leptonic decays of the $B$-meson, the pure dileptonic decay $B\to {\ell }^{+}{\ell }^{-}$ is very important as this mode is helicity suppressed in the SM but can be substantially enhanced in some of the models beyond the SM, such as supersymmetric (SUSY) theories and the two Higgs doublet model (2HDM). Although the purely dileptonic decay mode is helicity suppressed in the SM its associated mode $B\to {\ell }^{+}{\ell }^{-}\gamma$ does not have the same suppression, due to the presence of the $\gamma$ in the final state. In this paper we will also analyse the effects of enhanced $Z$-penguins on these two decay modes.

19 pages, 6 figures

References in corpus (13)

• Systematic approach to exclusive B ->V l^+l^-, V gamma decays
• Quark mass effects in B -> Xs gamma
• Lepton Polarization in the Decays $B\to X_s{\mu }^{+}{\mu }^{-}$ and $B\to X_s{\tau }^{+}{\tau }^{-}$
• Dileptonic decay of B_s meson in SUSY models with large tanβ
• B_{s,d} -> l+ l- in a Two-Higgs-Doublet Model
• B -> Xs l+ l- decays in supersymmetry
• Upper Bounds on $K\to \pi \nu \bar{\nu }$ and $K_L\to {\pi }^0{e}^{+}{e}^{-}$ from ${\epsilon }^{\prime }/\epsilon$ and $K_L\to {\mu }^{+}{\mu }^{-}$
• Constraints on the CKM Angle $\gamma$ and Strong Phases from $B\to \pi K$ Decays
• Gauge invariance and form factors for the decay B --> gamma l^+l^-
• Study of $B_{s,d}\to l^{+}{l}^{-}\gamma$ Decays
• Radiative Dileptonic Decays of B Mesons
• Charge Asymmetry and Photon Energy Spectrum in the Decay $B_s\to l^{+}{l}^{-}\gamma$
• Longitudinal polarization asymmetry of leptons in the pure leptonic B decays

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• Search for B(s) and B to dimuon decays in pp collisions at 7 TeV
• Study of FCNC mediated rare B_s decays in a single universal extra dimension scenario
• Electroweak, QCD and flavour physics studies with ATLAS data from Run 2 of the LHC
• Study of the rare decays $B_{(}s,d{)}^{\ast }$ arrow $l^{+}{l}^{-}$ in Z' model
• Study of $B_s^0\to l^{+}{l}^{-}\gamma$ decays in the nonuniversal Z' model
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