Unification, KK-thresholds and the top Yukawa coupling in F-theory GUTs

Leontaris, GK; Tracas, ND; Tsamis, G

dc.contributor.author	Leontaris, GK	en
dc.contributor.author	Tracas, ND	en
dc.contributor.author	Tsamis, G	en
dc.date.accessioned	2014-03-01T01:37:30Z
dc.date.available	2014-03-01T01:37:30Z
dc.date.issued	2011	en
dc.identifier.issn	1434-6044	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21532
dc.subject	Hierarchical Structure	en
dc.subject	Low Energy	en
dc.subject	Renormalization Group	en
dc.subject	Satisfiability	en
dc.subject	Spectrum	en
dc.subject	Threshold Effect	en
dc.subject	Topological Invariant	en
dc.subject.classification	Physics, Particles & Fields	en
dc.subject.other	TORSION	en
dc.subject.other	MANIFOLDS	en
dc.title	Unification, KK-thresholds and the top Yukawa coupling in F-theory GUTs	en
heal.type	journalArticle	en
heal.identifier.primary	10.1140/epjc/s10052-011-1768-1	en
heal.identifier.secondary	1768	en
heal.identifier.secondary	http://dx.doi.org/10.1140/epjc/s10052-011-1768-1	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	In a class of F-theory SU(5) GUTs the low energy chiral mass spectrum is obtained from rank one fermion mass textures with a hierarchical structure organized by U(1) symmetries embedded in the exceptional E8 group. In these theories chiral fields reside on matter 'curves' and the tree-level masses are computed from integrals of overlapping wave functions of the particles at the triple intersection points. This calculation requires knowledge of the exact form of the wave functions. In this work we propose a way to obtain a reliable estimate of the various quantities which determine the strength of the Yukawa couplings. We use previous analysis of KK-threshold effects to determine the (ratios of) heavy mass scales of the theory which are involved in the normalization of the wave functions. We consider similar effects from the chiral spectrum of these models and discuss possible constraints on the emerging matter content. In this approach, we find that the Yukawa couplings can be determined solely from the U(1) charges of the states in the 'intersection' and the torsion which is a topological invariant quantity. We apply the results to a viable SU(5) model with minimal spectrum which satisfies all the constraints imposed by our analysis. We use renormalization group analysis to estimate the top and bottom masses and find that they are in agreement with the experimental values. © 2011 Springer-Verlag / Società Italiana di Fisica.	en
heal.publisher	SPRINGER	en
heal.journalName	European Physical Journal C	en
dc.identifier.doi	10.1140/epjc/s10052-011-1768-1	en
dc.identifier.isi	ISI:000296631800001	en
dc.identifier.volume	71	en
dc.identifier.issue	10	en
dc.identifier.spage	1	en
dc.identifier.epage	17	en