Implications of a heavy top in supersymmetric theories

 
see the original item page
in the repository's web site and access all digital files if the item*
share




1995 (EN)
Implications of a heavy top in supersymmetric theories (EN)

Tracas, ND (EN)
Leontaris, GK (EN)

N/A (EN)

In the context of the radiative electroweak symmetry breaking scenario, we investigate the implications of a heavy top quark mass, close to its infrared fixed point, on the low energy parameters of the minimal supersymmetric standard model. We use analytic expressions to calculate the Higgs masses as well as the supersymmetric masses of the third generation. We further assume bottom-tau unification at the GUT scale and examine the constraints put by this condition on the parameter space (tan beta,alpha(3)), using the renormalization group procedure at the two-loop level. For supersymmetry breaking scale varying in the range (250-1000) GeV we find only a small fraction of the parameter space where the above conditions can be satisfied, namely 1 less than or equal to tan beta less than or equal to 2, while 0.114 less than or equal to alpha(3)(M(z)) less than or equal to 0.125. We further analyse in brief the case where all three Yukawa couplings reach the perturbative limit just after the unification scale. In this case, due to the large corrections on the bottom mass from sparticle loops, the top-mass and tan beta predictions are significantly lower than those estimated when such corrections were ignored. (EN)

journalArticle

Infrared (EN)
GUTS (EN)
GRAND UNIFIED THEORIES (EN)
N=1 SUPERGRAVITY (EN)
SU(4)XO(4) STRING MODEL (EN)
QUARK-MASS (EN)
STANDARD MODEL (EN)
Parameter Space (EN)
Supersymmetry Breaking (EN)
Electroweak Symmetry Breaking (EN)
UNIFICATION (EN)
CONSTRAINTS (EN)
Renormalization Group (EN)
minimal supersymmetric standard model (EN)
COUPLINGS (EN)
Fixed Point (EN)
Top Quark (EN)
Low Energy (EN)
Satisfiability (EN)
SYMMETRY-BREAKING (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (EN)

1995


ELSEVIER SCIENCE BV (EN)



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)