Two-loop QCD corrections to charged-Higgs-mediated $b\to sγ$ decay

Details Two-loop QCD corrections to charged-Higgs-mediated $b\to sγ$ decay Two-loop QCD corrections to charged-Higgs-mediated $b\to sγ$ decay

1997-10-10

arxiv.org/abs/hep-ph/9710312v2

Nucl.Phys.B524:361-376,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures. Misprints corrected. Comparison with hep-ph/9710335 added

Scientific paper

10.1016/S0550-3213(98)00190-4

The charged-Higgs-mediated contribution to the Wilson coefficient of the $b\to s\gamma$ 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 MSbar subtraction, for reasonable values of the charged Higgs mass and for mu-bar = m_top, we find a (10--20)% reduction of the corresponding one-loop effect.

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