No-Scale Scenario with Non-Universal Gaugino Masses

Details No-Scale Scenario with Non-Universal Gaugino Masses No-Scale Scenario with Non-Universal Gaugino Masses

2000-07-28

arxiv.org/abs/hep-ph/0007327v1

Phys.Rev.D63:035005,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 5 figures

Scientific paper

10.1103/PhysRevD.63.035005

Phenomenological issues of no-scale structure of K\"{a}hler potential are re-examined, which arises in various approaches to supersymmetry breaking. When no-scale boundary conditions are given at the Grand Unified scale and universal gaugino masses are postulated, a bino mass is quite degenerate with right-handed slepton masses and the requirement that the lightest superparticle (LSP) be neutral supplemented with slepton searches at LEP200 severely constrains allowed mass regions of superparticles. The situation drastically changes if one moderately relaxes the assumption of the universal gaugino masses. After reviewing some interesting scenarios where non-universal gaugino masses arise, we show that the non-universality diminishes the otherwise severe constraint on the superparticle masses, and leads a variety of superparticle mass spectra: in particular the LSP can be a wino-like neutralino, a higgsino-like neutralino, or even a sneutrino, and also left-handed sleptons can be lighter than right-handed ones.

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