1994/06/30 by J. Lopez, Jorge L. Lopez, D. Nanopoulos +3 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.51.147
published as Phys.Rev.D51:147-157,1995 · 26 pages, 11 figures (not included), Latex. Figures are available via anonymous ftp from hplaa02.cern.ch /pub/lopez as uuencoded file BsgFigs.uu. Complete ps file is also available (BsgPaper.ps)
arxiv created 1994/06/30 · openalex publication_date 1995/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We perform a detailed study of the constraints from b\ensuremath→s\ensuremathγ on a large class of supergravity models, including generic four-parameter supergravity models, the minimal SU(5) supergravity model, and SU(5)\ifmmode×\else\texttimes\fiU(1) supergravity. For each point in the parameter spaces of these models we obtain a range of B(b\ensuremath→s\ensuremathγ) values which should conservatively account for the unknown next-to-leading-order QCD corrections. We then classify these points into three categories: ``excluded'' points have ranges of B(b\ensuremath→s\ensuremathγ) which do not overlap with the experimentally allowed range, ``preferred'' points have B(b\ensuremath→s\ensuremathγ) ranges which overlap with the standard model prediction, and ``okay'' points are neither ``excluded'' nor ``preferred'' but may become ``excluded'' should new CLEO data be consistent with the standard model prediction. In all cases we observe a strong tendency for the ``preferred'' points towards one sign of the Higgs mixing parameter \ensuremathμ. For the opposite sign of \ensuremathμ there is an upper bound on tan\ensuremathβ: tan \ensuremathβ\ensuremath\lesssim25 in general, and tan \ensuremathβ\ensuremath\lesssim6 for the ``preferred'' points. We conclude that new CLEO data will provide a decisive test of supergravity models.