Two-loop heavy top corrections to the b --> s gamma decay

Abstract

We compute the two-loop corrections to the coefficient of the b --> s gamma magnetic penguin present in the limits of heavy top and/or heavy higgs. This kind of corrections affects in a significant way the observables measured at LEP. On the contrary we find that, due to a numerical accident, the correction to BR(B --> X_s gamma) is negligible (below the 1% level for any possible value of the higgs mass) when the leading order result is expressed in the usual way in terms of the semileptonic BR(B --> X_c \bar{e}ν).

10 pages, 3 figures. (v2): reference added

References in corpus (6)

• CP Asymmetries in B Decays with New Physics in Decay Amplitudes
• Two-loop matching of the dipole operators for $b\to s\gamma$ and $b\to sgluon$
• Elementary derivation of a recently proposed integral representation for permanents
• Electroweak Precision Tests: A Concise Review
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• Present Status of Inclusive Rare B Decays
• Supernatural Supersymmetry: Phenomenological Implications of Anomaly-Mediated Supersymmetry Breaking
• Addendum to: 2HDMs predictions for $B\to X_s\gamma$ in NLO QCD
• Matching Conditions for $b\to s\gamma$ and $b\to sgluon$ in Extensions of the Standard Model
• Practical Algebraic Renormalization
• Focus Point Supersymmetry: Proton Decay, Flavor and CP Violation, and the Higgs Boson Mass
• The electromagnetic dipole operator effect on B -> Xs gamma at O(alpha_s^2)
• Two-Loop Matrix Element of the Current-Current Operator in the Decay B -> X_s gamma
• The Algebraic Method
• The O(alpha_em/alpha_s) correction to BR[B -> X_s gamma]
• Inclusive Rare B Decays
• Rare decays: theory vs. experiments
• Heavy fermions and two loop electroweak corrections to $b\to s+\gamma$