Charged Higgs mass bound from the $b\rightarrow sγ$ process in the minimal supergravity model

Details Charged Higgs mass bound from the $b\rightarrow sγ$ process in the minimal supergravity model Charged Higgs mass bound from the $b\rightarrow sγ$ process in the minimal supergravity model

1994-12-03

arxiv.org/abs/hep-ph/9412225v1

Prog.Theor.Phys.94:407-416,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 8 EPS figures (appended in tar-gzip-uuencoded form)

Scientific paper

10.1143/PTP.94.407

We study the constraint on the mass of the charged Higgs boson in the minimal supergravity model based on the recent measurement of the inclusive $b\rightarrow s\gamma$ decay. It is shown that the lower bound for the charged Higgs mass crucially depends on the sign of the higgsino mass parameter ($\mu$). For $\mu<0$, the bound exceeds 400 GeV when the ratio of two Higgs vacuum expectation values ($\tan\beta$) is larger than 10. No strong bound is obtained for $\mu>0$ due to cancellations between charged Higgs and supersymmetric particle contributions. For $3\lsim\tan\beta\lsim5$, a charged Higgs lighter than 180 GeV is excluded by this process irrespective of the sign of $\mu$.

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