$B \rightarrow X_s\,γ$ and $B \rightarrow K^*\,γ$ in the standard and 2H models

Details $B \rightarrow X_s\,γ$ and $B \rightarrow K^*\,γ$ in the standard and 2H models $B \rightarrow X_s\,γ$ and $B \rightarrow K^*\,γ$ in the standard and 2H models

1994-10-17

arxiv.org/abs/hep-ph/9410300v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

(talk given at ICHEP '94), 2 pp (figures not included), LaTeX, INFN-ISS 94/9 (October 1994)

Scientific paper

Theoretical predictions for the branching ratios of the $B \rightarrow X_s\,\gamma$ and $B \rightarrow K^*\,\gamma$ decays are calculated in the Standard Model and in the (type II) two-Higgs-doublet model. Both the complete leading and the partially known next-to-leading order QCD corrections are included. The uncertainties due to the regularization scheme dependence introduced by the incomplete NLO terms are discussed. The results are compared with the recent CLEO II measurements and a new lower limit on the charged Higgs boson mass, $M_{H^\pm} > \sim 200$ GeV, is obtained.

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