CP Asymmetries in Radiative B Decays with R-parity Violation

Abstract

We analyze the effect of R-parity violation in the minimal supersymmetric standard model on the CP asymmetries in $b\to s\gamma$ decay. The direct and mixing-induced CP asymmetries arising from the lepton number violating couplings are strongly constrained by the current experimental limits on the corresponding couplings. Allowing a heavy neutrino ($m_{{\nu }_{\tau }}\sim 10$ keV) and a moderate mass splitting of sfermions, the direct CP asymmetry around 15 % and the nearly maximal mixing-induced CP asymmetry ($\sim 100$) can be realized, depending on the R-parity conserving contributions to the radiative $b$ decay. With the baryon number violating couplings, only the mixing-induced CP asymmetry arises and it can be maximal provided there is a the similar sfermion mass splitting.

20 pages, 2 figures. Eqs. (24,25,37) and typos corrected. Conclusions unchanged. To appear in Phy. Rev. D

References in corpus (1)

• Phenomenology of flavor-mediated supersymmetry breaking

Cited by in corpus (12)

• B->V gamma Beyond QCD Factorisation
• Present Status of Inclusive Rare B Decays
• Untagged B -> X_(s+d) gamma CP asymmetry as a probe for new physics
• Time-dependent CP Asymmetry in B->K* gamma as a (Quasi) Null Test of the Standard Model
• Direct CP violation in radiative b decays in and beyond the Standard Model
• Null tests of the Standard Model at an International Super $B$ Factory
• R-Parity Violation and the Decay b to s gamma
• Measurement of Time-dependent $CP$ Asymmetries in $B^0\to K_S^0\eta \gamma$ Decays
• Branching Fractions and CP-Violating Asymmetries in Radiative B Decays to eta K gamma
• Radiative B decays in Supersymmetry without R-parity
• Lightest-neutralino decays in R_p-violating models with dominant lambda^{prime} and lambda couplings
• Some Novel Contributions to Radiative B Decay in Supersymmetry without R-parity