• Phenomenology of the minimal supergravitySU(5) model

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      https://www.ias.ac.in/article/fulltext/pram/045/S1/0085-0108

    • Abstract

       

      The minimal grand unified supergravity model is discussed. Requiring radiative breaking of the electroweak gauge symmetry, the unification ofb and τ Yukawa couplings, a sufficiently stable nucleon, and not too large a relic density of neutralinos produced in the Big Bang constrains the parameter space significantly. In particular, the soft breaking parameterm1/2 has to be less than about 130 GeV, and the top quark Yukawa coupling has to be near its (quasi) fixed point. The former condition implies$$m_{\bar g} \leqslant 400$$ GeV and hence very large production rates for gluino pairs at the LHC, while the latter constraint implies that the lighter stop and sbottom eigenstates are significantly lighter than the other squarks, leading to characteristic signatures for gluino pair events.

    • Author Affiliations

       

      Manuel Drees1

      1. Physics Department, University of Wisconsin, Madison, WI - 53706, USA
    • Dates

       
  • Pramana – Journal of Physics | News

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