Dynamical fermion mass generation by a strong Yukawa interaction

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dc.creatorBrauner, Tomas
dc.creatorHosek, Jiri
dc.date2005-05-27
dc.date.accessioned2026-07-07T03:54:58Z
dc.date.available2026-07-07T03:54:58Z
dc.descriptionWe consider a model with global Abelian chiral symmetry of two massless fermion fields interacting with a complex massive scalar field. We argue that the Schwinger-Dyson equations for the fermion and boson propagators admit ultraviolet-finite chiral-symmetry-breaking solutions provided the Yukawa couplings are large enough. The fermions acquire masses and the elementary excitations of the complex scalar field are the two real spin-zero particles with different masses. As a necessary consequence of the dynamical chiral symmetry breakdown both in the fermion and scalar sectors, one massless pseudoscalar Nambu--Goldstone boson appears in the spectrum as a collective excitation of both the fermion and the boson fields. Its effective couplings to the fermion and boson fields are calculable.
dc.description9 pages, REVTeX4, uses feynmp, 1 eps figure
dc.identifierhttps://arxiv.org/abs/hep-ph/0505231
dc.identifierhttp://arxiv.org/abs/hep-ph/0505231
dc.identifierPhys.Rev. D72 (2005) 045007
dc.identifierdoi:10.1103/PhysRevD.72.045007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/44398
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDynamical fermion mass generation by a strong Yukawa interaction
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