Implications of B -> rho gamma measurements in the Standard Model and Supersymmetric Theories

Abstract

We study the implications of the recently improved upper limits on the branching ratios for the decays B -> rho gamma, expressed as R(rho gamma/K^* gamma) = BR(B -> rho gamma)/BR(B -> K^* gamma) <0.047. We work out the constraints that the current bound on R(rho gamma/K^* gamma) implies on the parameters of the quark mixing matrix in the standard model (SM). Using the present profile of the unitarity triangle, we predict this ratio to be R(rho gamma/K^* gamma) = 0.023 +/- 0.012. We also work out the correlations involving R(rho gamma/K^* gamma), the isospin-violating ratio Delta (rho gamma), and the direct CP-violating asymmetry A_CP (rho gamma) in B -> rho gamma decays in the SM, in the minimal supersymmetric extension of the SM (MSSM), and in an extension of the MSSM involving an additional flavor-changing structure in b -> d transitions.

11 pages, 6 figures, experimental inputs updated, typos corrected

Cited by in corpus (13)

• The Physics of the B Factories
• Implication of the $B\to (\rho ,\omega )\gamma$ Branching Ratios for the CKM Phenomenology
• Observation of b --> d gamma and Determination of |V_td/V_ts|
• Constraining the Unitarity Triangle with B -> V gamma
• CP Asymmetry, Branching ratios and Isospin breaking effects in B-> rho gamma and B-> omega gamma decays with the pQCD approach
• Measurement of branching fractions, isospin and CP-violating asymmetries for exclusive \boldmath$b\to d\gamma$ modes
• Spectator interactions in B -> V gamma decays and QCD factorisation
• Nonperturbative Charming Penguin Contributions to Isospin Asymmetries in Radiative B decays
• Time dependent CP asymmetry in $B^0\to {\rho }^0\gamma$ decay to probe the origin of CP violation
• Branching Ratio and CP-asymmetry for B-> 1^{1}P_{1}gamma decays
• CKM Parameters and Rare B Decays
• Standard Model CP violation in B->X_d \ell^+\ell^- decays
• QCD and Heavy Hadron Decays