Random walk approximation in a chiral Yukawa-model and global symmetries

Farakos, K; Koutsoumbas, G; Montvay, I

dc.contributor.author	Farakos, K	en
dc.contributor.author	Koutsoumbas, G	en
dc.contributor.author	Montvay, I	en
dc.date.accessioned	2014-03-01T01:08:07Z
dc.date.available	2014-03-01T01:08:07Z
dc.date.issued	1990	en
dc.identifier.issn	0170-9739	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10289
dc.subject	Degeneration	en
dc.subject	Global Symmetries	en
dc.subject	Spectrum	en
dc.subject	Symmetry Breaking	en
dc.subject	Random Walk	en
dc.subject.classification	Physics, Particles & Fields	en
dc.title	Random walk approximation in a chiral Yukawa-model and global symmetries	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF01552331	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF01552331	en
heal.language	English	en
heal.publicationDate	1990	en
heal.abstract	The fermion propagator is investigated in a chiral Yukawa-model with explicit mirror fermions applying the random walk approximation to the hopping parameter expansion. It is shown that the global SU(2)L⊗SU(2)R symmetry breaking due to the mass splitting within fermion doublets does influence the critical behaviour of the fermion spectrum in the continuum limit. In particular, in the case of a mirror pair of split doublets, where SU(2)L⊕SU(2)R is broken to SU(2)L, no evidence is found for a dynamical spectrum doubling at infinitely strong bare Yukawa-couplings, in contrast to the case with degenerate doublets and SU(2)L⊗SU(2)R symmetry. © 1990 Springer-Verlag.	en
heal.publisher	Springer-Verlag	en
heal.journalName	Zeitschrift für Physik C Particles and Fields	en
dc.identifier.doi	10.1007/BF01552331	en
dc.identifier.isi	ISI:A1990DW80100018	en
dc.identifier.volume	47	en
dc.identifier.issue	4	en
dc.identifier.spage	641	en
dc.identifier.epage	645	en