BS-]GAMMA-GAMMA DECAY IN THE 2-HIGGS-DOUBLET MODEL


ALIEV T. , TURAN G.

PHYSICAL REVIEW D, vol.48, no.3, pp.1176-1184, 1993 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 3
  • Publication Date: 1993
  • Doi Number: 10.1103/physrevd.48.1176
  • Title of Journal : PHYSICAL REVIEW D
  • Page Numbers: pp.1176-1184

Abstract

The rare B(s) --> gammagamma decay has been investigated in the framework of the two-Higgs-doublet model. It is shown that the branching ratio has a great enhancement in comparison to the standard model (SM) prediction. We have found that the ratio of the square of the CP = 1 to CP = -1 amplitudes, \A+\2/\A-\2, which is always less than one in the SM, becomes greater than one for some values of M(H)/M(t). We have also calculated the direct CP-violating parameter epsilon'(gammagamma(-)). It is found that for K --> gammagamma decay its value is greater than the one which follows from the SM, while for B(s) --> gammagamma decay both models have the same predictions. Finally, we compare our results on B(s) --> gammagamma decay with the results of B(s) --> mu+mu- and B(s) --> mu+mu- decays which are of the same order of the coupling constant.