Renormalization group analysis and the top quark mass in the SU(4)XO(4) string model

Leontaris, GK; Tracas, ND

dc.contributor.author	Leontaris, GK	en
dc.contributor.author	Tracas, ND	en
dc.date.accessioned	2014-03-01T01:08:31Z
dc.date.available	2014-03-01T01:08:31Z
dc.date.issued	1991	en
dc.identifier.issn	0370-2693	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10549
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0040352316&partnerID=40&md5=78778004dca36632b93db7b31bb12f64	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	SYMMETRY-BREAKING	en
dc.subject.other	PROTON DECAY	en
dc.subject.other	CONSTRUCTION	en
dc.subject.other	ORBIFOLDS	en
dc.title	Renormalization group analysis and the top quark mass in the SU(4)XO(4) string model	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	We perform a two-loop renormalization group analysis for the gauge couplings in the SU(4) x O(4) model. We use the string theory prediction for the unification scale and the experimentally acceptable low energy values for alpha-3 and sin2-theta-w, to determine the magnitudes of the various symmetry breaking scales as well as the value of the common gauge coupling at the unification scale. We solve the coupled differential system for the gauge and top and bottom Yukawa couplings, and determine the top mass as a function of two parameters which could be chosen to be the ratio of the Higgs VEV's that give masses to the up and down quarks and the value of the top coupling at the unification scale. We find a relatively heavy top quark mass which lies in the range 130 less-than-or-equal-to m(t) less-than-or-equal-to 180 GeV.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics	en
dc.identifier.isi	ISI:A1991FP72500013	en
dc.identifier.volume	260	en
dc.identifier.issue	3-4	en
dc.identifier.spage	339	en
dc.identifier.epage	345	en