Recent developments in radiative B decays

Abstract

We report on recent theoretical progress in radiative B decays. We focus on a calculation of logarithmically enhanced QED corrections to the branching ratio and forward-backward asymmetry in the inclusive rare decay anti-B --> X(s) l+ l-, and present the results of a detailed phenomenological analysis. We also report on the calculation of NNLO QCD corrections to the inclusive decay anti-B --> X(s) gamma. As far as exclusive modes are concerned we consider transversity amplitudes and the impact of right-handed currents in the exclusive anti-B --> K^* l+ l- decay. Finally, we state results for exclusive B --> V gamma decays, notably the time-dependent CP-asymmetry in the exclusive B --> K^* gamma decay and its potential to serve as a so-called ``null test'' of the Standard Model, and the extraction of CKM and unitarity triangle parameters from B --> (rho,omega) gamma and B --> K^* gamma decays.

5 pages, 2 figures. Accepted for publication in the proceedings of International Europhysics Conference on High Energy Physics (EPS-HEP2007), Manchester, England, 19-25 Jul 2007

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• Improved Measurement of the Electroweak Penguin Process B->Xsll
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• Three-loop matching of the dipole operators for b -> s gamma and b -> s g
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• Three-Loop Mixing of Dipole Operators
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• Comment On Nonperturbative O(1/m_c^2) Corrections to B -> X_s gamma
• Complete electroweak matching for radiative B decays
• The electromagnetic dipole operator effect on B -> Xs gamma at O(alpha_s^2)
• Time-Dependent CP Asymmetries in B0 -> Ks pi0 gamma transitions
• Enhanced Non-local Power Corrections to the B->X_s+gamma Decay Rate
• NNLL QCD Contribution of the Electromagnetic Dipole Operator to Gamma(anti-B -> X(s) gamma)
• Corrections to Moments of the Photon Spectrum in the Inclusive Decay B \to X_s γ
• Observation of b --> d gamma and Determination of |V_td/V_ts|
• Magnetic dipole operator contributions to the photon energy spectrum in anti-B -> X(s) gamma at O(alpha(s)^2)
• Precise predictions for B -> Xs l+ l- in the large q^2 region
• Charm quark mass dependence of the electromagnetic dipole operator contribution to anti-B -> X(s) gamma at O(alpha**2(s))
• Non-1/m_b^n Power Suppressed Contributions to Inclusive b->s l+ l- Decays
• Extracting short distance information from b -> s l+ l- effectively
• The CP asymmetry in B^0(t) -> K_S π^0 γin the Standard Model
• Electroweak effects in radiative B decays
• Mixing-induced CP asymmetry in B-> K* gamma decays with perturbative QCD approach
• The O(alpha_em/alpha_s) correction to BR[B -> X_s gamma]
• Nonperturbative corrections to moments of the decay B -> X_s l^+ l^-
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• Measurement of the time-dependent CP-violating asymmetry in $B^0\to K_s^0{\pi }^0\gamma$ decays
• Null tests of the Standard Model at an International Super $B$ Factory
• Status of SM calculations of b > s transitions

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