Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-07-31
Phys.Lett. B416 (1998) 353-360
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, LaTeX, 4 figures included using epsfig. Minor changes. Misprint corrected.Version to appear in Phys. Lett. B
Scientific paper
10.1016/S0370-2693(97)01247-1
From the tau-lepton analysis of the charged Higgs decay of the top quark at the Tevatron, t -> H+ b -> tau+ nu_{tau} b, it is possible to set rather stringent bounds on the (tan(beta),M_{H+})-plane, if one assumes that H+ is a charged member of a generic two-Higgs-doublet model. However, if we consider the possibility that H+ is supersymmetric, then we find that the allowed region in the (tan(beta),M_{H+})-plane can be significantly modified by the MSSM quantum corrections. Throughout our analysis we correlate the top quark results with the limits imposed by radiative and semileptonic B-meson decays. Remarkably, one can envision situations in the MSSM parameter space where H+ completely eludes those bounds, i.e. a charged Higgs with a mass below the top quark mass could coexist with essentially any value of tan(beta).
Guasch Jaume
Sola Joan
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