MSSM predictions of the neutral Higgs boson masses and LEP II production cross sections

Abstract

Within the framework of the Minimal Supersymmetric Standard Model (MSSM) the Higgs masses and LEP II production cross sections are calculated for a wide range of the parameter space. In addition, the parameter space restricted by unification, electroweak symmetry breaking and other low energy constraints is considered in detail, in which case the masses of all SUSY partners can be estimated, so that their contributions to the radiative corrections can be calculated. Explicit analytical formulae for these contributions are derived. The radiative corrections from the Yukawa couplings of the third generation are found to dominate over the contributions from charginos and neutralinos. Large Higgs mass uncertainties are due to the top mass uncertainty and the unknown sign of the Higgs mixing parameter. For the low tan β scenario the mass of the lightest Higgs is found to be below 90 GeV for a top mass below 180 GeV. The cross section at a LEP II energy of 192 GeV is sufficient to find or exclude this scenario. For the high tan β scenario only a small fraction of the parameter space can be covered, since the Higgs mass is predicted between 105 and 125 GeV in most cases. At the theoretically possible LEP II energy of 205 GeV part of the parameter space for the large tan β scenario would be accessible.

Where to look for natural supersymmetry

“…Appendix: The expressions for the Σ u u (t 1,2 ,b 1,2 ) contributions to ∆ EW For self-sufficiency we explicitly show the expressions for Σ u u (t 1,2 ,b 1,2 ) according to [69,70] Σ u u (t 1,2 ) = 3…”

Supersymmetry in high energy and particle physics

“…Corrections coming from other (s)particles appear to be much smaller [18]. The predicted mass range for the lightest Higgs boson in the MSSM is illustrated in Fig.…”

Finite Unified Theories and the Higgs Mass Prediction

“…not logarithmically divergent) corrections in changing renormalization scheme. The one-loop radiative corrections have been included [27] for m h , but not for the rest of the spectrum. In making the analysis, the value of M was varied from 200 − 2000 GeV for FUTA.…”