2004/08/13 by Qaisar Shafi, Shafi, Qaisar, Zurab Tavartkiladze +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0408156
10 pages, LaTex
arxiv created 2004/08/13 · arxiv updated 2009/12/01
Within the MSSM framework and with purely anomaly mediated supersymmetry breaking the slepton masses turn out to be tachyonic. We resolve this problem by introducing an anomaly free U(1) gauge symmetry which provides positive D-term contributions to sparticle masses squared that are flavor conserving at one loop. Two realistic examples based on SU(5) are presented. With U(1) spontaneously broken at a scale ∼ 1016 GeV, the right handed neutrinos acquire masses \stackrel<_∼1014 GeV. This breaking scale of U(1) also plays an important role in the proposed resolution of the MSSM μ problem.