Gauge coupling unification and the top mass in string models with SU(4) × O(4) symmetry

Leontaris, GK; Tracas, ND

dc.contributor.author	Leontaris, GK	en
dc.contributor.author	Tracas, ND	en
dc.date.accessioned	2014-03-01T01:11:58Z
dc.date.available	2014-03-01T01:11:58Z
dc.date.issued	1996	en
dc.identifier.issn	0370-2693	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11897
dc.subject	Fixed Point	en
dc.subject	Low Energy	en
dc.subject	Infra Red	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	THRESHOLD CORRECTIONS	en
dc.subject.other	4-DIMENSIONAL SUPERSTRINGS	en
dc.subject.other	GRAVITATIONAL COUPLINGS	en
dc.subject.other	MODULAR INVARIANCE	en
dc.subject.other	FLIPPED SU(5)	en
dc.subject.other	SCALE	en
dc.title	Gauge coupling unification and the top mass in string models with SU(4) × O(4) symmetry	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0370-2693(96)00083-4	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0370-2693(96)00083-4	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	We discuss the low energy implications of gauge coupling unification at the string scale, taking into account string threshold corrections in the SU(4) x O(4) model. We express sin(2) theta(w) and a(3) as functions of the calculable string threshold differences and discuss simple examples of spectra which retain the successful predictions of the supersymmetric unification. Using further the low energy data and reasonable values of the common gauge coupling at the string scale, we obtain the range of the threshold corrections. Finally, we study the top Yukawa coupling (h(t)) evolution whose initial value is determined in terms of the common gauge coupling at the string scale. We find that h(t) reaches its (quasi) infra-red fixed point at the weak scale and discuss the implications on the top mass.	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(96)00083-4	en
dc.identifier.isi	ISI:A1996UF99700007	en
dc.identifier.volume	372	en
dc.identifier.issue	3-4	en
dc.identifier.spage	219	en
dc.identifier.epage	225	en