Annihilation-Type Charmless Radiative Decays of B Meson in Non-universal Z^\prime Model

Abstract

We study charmless pure annihilation type radiative B decays within the QCD factorization approach. After adding the vertex corrections to the naive factorization approach, we find that the branching ratios of ${\bar{B}}_d^0\to \varphi \gamma$, ${\bar{B}}_s^0\to {\rho }^0\gamma$ and ${\bar{B}}_s^0\to \omega \gamma$ within the standard model are at the order of $\mathcal{O}(10^{-12})$, $\mathcal{O}(10^{-10})$ and $\mathcal{O}(10^{-11})$, respectively. The smallness of these decays in the standard model makes them sensitive probes of flavor physics beyond the standard model. To explore their physics potential, we have estimated the contribution of $Z^{\prime }$ boson in the decays. Within the allowed parameter space, the branching ratios of these decay modes can be enhanced remarkably in the non-universal $Z^{\prime }$ model: The branching ratios can reach to $\mathcal{O}(10^{-8})$ for ${\bar{B}}_s^0\to {\rho }^0(\omega )\gamma$ and $\mathcal{O}(10^{-10})$ for the ${\bar{B}}_d^0\to \varphi \gamma$, which are large enough for LHC-b and/or Super B-factories to detect those channels in near future. Moreover, we also predict large CP asymmetries in suitable parameter space. The observation of these modes could in turn help us to constrain the $Z^{\prime }$ mass within the model.

13 pages, 8 figures

References in corpus (6)

• B->V gamma Beyond QCD Factorisation
• Constraints on flavor-changing Z' models by B_s mixing, Z' production, and B_s -> μ^+ μ^-
• Family Non-universal $U(1{)}^{\prime }$ Gauge Symmetries and $b\to s$ Transitions
• Explaining B \to K pi anomaly with non-universal Z' boson
• Annihilation Type Radiative Decays of $B$ Meson in Perturbative QCD Approach
• Flavorful $Z^{\prime }$ signatures at LHC and ILC

Cited by in corpus (4)

• Imprints of CP violation asymmetries in rare ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ decay in family non-universal $Z^{\prime }$ model
• Analysis of ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ rare decays in a non-universal $Z^{\prime }$ model
• Recent results from the Belle experiment
• Effects from Hadronic Structure of Photon on $B\to \varphi \gamma$ and $B_s\to ({\rho }^0,\omega )\gamma$ Decays