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The low-energy supersymmetric spectrum according to N = 1 supergravity guts

1985; Elsevier BV; Volume: 256; Linguagem: Inglês

10.1016/0550-3213(85)90393-1

1873-1562

Luis E. Ibáñez, Cristina Silvia Polo López, Carlos Muñoz,

Neutrino Physics Research

We reexamine the radiative SU(2) × U(1) breaking induced by broken N = 1 supergravity in the light of recent experimental results. Explicit formulae are given for the supersymmetric particle spectrum and the SU(2) × U(1) breaking condition. The experimental results (t-quark mass) constrain the supergravity parameters, particularly the bare higgsino mass μ0 and the "mixing" Higgs mass term μ32. Models with globally supersymmetric "observable" sectors (except for gaugino masses) are excluded in their simplest version. If the identity B = A − 1 is assumed, further restrictions on the range of the supergravity parameters are found. The particle spectra leading to possible supersymmetric interpretations of the CERN missing pT events are analyzed. We study in detail the following three scenarios: (i) mq ⋍ 80–140 GeV, Mg = 3 GeV; (ii)q ⋍ Mg ⋍ 40 GeV; (iii) Mg = 40 GeV, mq ⪢ Mg and give the corresponding spectra of sparticles as a function of the A-parameter.