Implications of a heavy top in supersymmetric theories

Leontaris, GK; Tracas, ND

dc.contributor.author	Leontaris, GK	en
dc.contributor.author	Tracas, ND	en
dc.date.accessioned	2014-03-01T01:11:07Z
dc.date.available	2014-03-01T01:11:07Z
dc.date.issued	1995	en
dc.identifier.issn	0370-2693	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11553
dc.subject	Electroweak Symmetry Breaking	en
dc.subject	Fixed Point	en
dc.subject	Infrared	en
dc.subject	Low Energy	en
dc.subject	Parameter Space	en
dc.subject	Renormalization Group	en
dc.subject	Satisfiability	en
dc.subject	Supersymmetry Breaking	en
dc.subject	Top Quark	en
dc.subject	minimal supersymmetric standard model	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	GRAND UNIFIED THEORIES	en
dc.subject.other	SU(4)XO(4) STRING MODEL	en
dc.subject.other	SYMMETRY-BREAKING	en
dc.subject.other	QUARK-MASS	en
dc.subject.other	N=1 SUPERGRAVITY	en
dc.subject.other	STANDARD MODEL	en
dc.subject.other	UNIFICATION	en
dc.subject.other	GUTS	en
dc.subject.other	CONSTRAINTS	en
dc.subject.other	COUPLINGS	en
dc.title	Implications of a heavy top in supersymmetric theories	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0370-2693(94)01546-O	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0370-2693(94)01546-O	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	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
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics	en
dc.identifier.doi	10.1016/0370-2693(94)01546-O	en
dc.identifier.isi	ISI:A1995QF49500003	en
dc.identifier.volume	345	en
dc.identifier.issue	1	en
dc.identifier.spage	15	en
dc.identifier.epage	24	en