2002/04/30 by D. Demir, D. A. Demir, Keith A. Olive +2 · 7 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.66.034015
published as Phys.Rev.D66:034015,2002 · 18 pages; 11 eps figures; minor changes in text; journal version
arxiv created 2002/06/25 · openalex publication_date 2002/08/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We analyze the forward-backward asymmetry of the decays \stackrel\ensuremath→B(\ensuremathπ,K)l+l^\ensuremath- with l=\ensuremathμ or \ensuremathτ in the framework of the constrained minimal supersymmetric standard model. We find that the asymmetry is enhanced at large tan\ensuremathβ and depends strongly on the sign of the \ensuremathμ parameter. For \ensuremathμ>0, the asymmetry is typically large and observable, whereas for \ensuremathμ<0 it changes the sign and is suppressed by an order of magnitude. Including cosmological constraints we find that the asymmetry has a maximal value of about 30%, produced when Higgs- and gauge-induced flavor violations are of comparable size, at a value of tan\ensuremathβ\ensuremath≃35. The present constraints from the B factories are too weak to constrain parameter space, and the regions excluded by them are already disfavored by at least one of BR(\stackrel\ensuremath→BXs\ensuremathγ), g\ensuremath-2, and/or cosmology. The size of the asymmetry is mainly determined by the flavor of the final state lepton rather than the flavor of the pseudoscalar.