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

STRUMIA, ALESSANDRO
1998

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.
Ciafaloni, P; Romanino, A; Strumia, Alessandro
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/45987
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 84
social impact