1993/06/25 by R. Arnowitt, Pran Nath, Arnowitt, R. +1
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9306316
18 Pages, 10 figures avaliable upon request, CTP-TAMU-23/93, NUB-TH-3062/92, SSCL-Preprint-229
arxiv created 1993/06/25 · openalex publication_date 1993/06/25 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Properties and experimental predictions of a broad class of supergravity grand unified models possessing an SU(5)-type proton decay and R parity are described. Models of this type can be described in terms of four parameters at the Gut scale in addition to those of the Standard Model i.e. mo (universal scalar mass), m1/2 (universal gaugino mass), Ao (cubic soft breaking parameter) and tanβ=/. Thus the 32 SUSY masses can be expressed in terms of mo, m1/2, Ao tanβ and the as yet unknown t-quark mass mt. Gut thresholds are examined and a simple model leads to grand unification consistent with p-decay data when 0.1140) or m_W1 ≃(1/3)m_g (for μ<0), while m_W2≅ m_Z3≅ m_Z4>>m_Z1. Future proton decay experiments combined with LEP2 lead to further predictions, e.g. for the entire parameter space either proton decay should be seen at these or theW1 seen at LEP2. Relic density constraints on the Z1 further constrain the parameter space e.g. so that mt<165~GeV, mh<105~GeV, m_W1 <100~GeV and m_Z1<50~GeV when MH3/MG < 6. (Invited talk at Les Rencontres de Physique de la Vallee D'Aoste