Time dependent CP asymmetry in $B^0\to {\rho }^0\gamma$ decay to probe the origin of CP violation

Abstract

Since the CP violation in the $B$ system has been investigated up to now only through processes related to the $B$--$\bar{B}$ mixing, urgently required is new way of study for the CP violation and establishing its origin in the $B$ system independent of the mixing process. In this work, we explore the exclusive $B^0\to {\rho }^0\gamma$ decay to obtain the time-dependent CP asymmetry in $b\to d$ decay process in the standard model and the supersymmetric model. We find that the complex RL and RR mass insertion to the squark sector in the MSSM can lead to a large CP asymmetry in $b\to d\gamma$ decay through the gluino-squark diagrams, which is not predicted in the Standard Model induced by the $B$--$\bar{B}$ mixing.

arXiv comment10 pages, 4 eps figures

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Cited by in corpus (3)

• Exclusive radiative B-meson decays within the aligned two-Higgs-doublet model
• Exclusive radiative B-meson decays within minimal flavour violating 2HDMs
• Time-Dependent {\boldmath $CP$}-Violating Asymmetry in $B^0\to {\rho }^0\gamma$ Decays