2001/10/02 by Shinji Komine, Masahiro Yamaguchi · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Computer science #Grand Unified Theory #Muon #Particle physics #Particle physics theoretical and experimental studies #Physics #Programming language #Quantum Chromodynamics and Particle Interactions #SO(10) #Supergravity #Supersymmetry #Unification #Yukawa potential #hep-ph
paper · pdf · doi:10.1103/physrevd.65.075013
published as Phys.Rev. D65 (2002) 075013 · 21pages, 6figures
arxiv created 2001/10/02 · openalex publication_date 2002/03/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
An analysis is made on bottom-tau Yukawa unification in supersymmetric (SUSY) SU(5) grand unified theory (GUT) in the framework of minimal supergravity, in which the parameter space is restricted by some experimental constraints including Br(\stackrel\ensuremath→bs\ensuremathγ) and muon g\ensuremath-2. The bottom-tau unification can be accommodated to the measured branching ratio Br(\stackrel\ensuremath→bs\ensuremathγ) if superparticle masses are relatively heavy and the Higgsino mass parameter \ensuremathμ is negative. On the other hand, if we take the latest muon g\ensuremath-2 data to require positive SUSY contributions, then wrong-sign threshold corrections at the SUSY scale upset the Yukawa unification with more than 20% discrepancy. It has to be compensated by superheavy threshold corrections around the GUT scale, which constrains models of flavor in SUSY GUT. A pattern of the superparticle masses preferred by the three requirements is also commented upon.