The charged-Higgs-mediated contribution to the Wilson coefficient of the b --> s gamma magnetic penguin is expected to be one of the more promising candidates for a supersymmetric effect in B physics, probably the only one in gauge-mediated models. We compute the two-loop QCD correction to it. With naive dimensional regularization and <(MS)over bar> subtraction, for reasonable values of the charged Higgs mass and for <(mu)over bar> = m(t), we find a (10-20) % reduction of the corresponding one-loop effect. (C) 1998 Elsevier Science B.V.

Two-loop QCD corrections to charged-Higgs-mediated b -> s gamma decay

Romanino, Andrea;
1998-01-01

Abstract

The charged-Higgs-mediated contribution to the Wilson coefficient of the b --> s gamma magnetic penguin is expected to be one of the more promising candidates for a supersymmetric effect in B physics, probably the only one in gauge-mediated models. We compute the two-loop QCD correction to it. With naive dimensional regularization and <(MS)over bar> subtraction, for reasonable values of the charged Higgs mass and for <(mu)over bar> = m(t), we find a (10-20) % reduction of the corresponding one-loop effect. (C) 1998 Elsevier Science B.V.
1998
524
1-2
361
376
Ciafaloni, P; Romanino, Andrea; Strumia, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/16889
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