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Description
  • Uvažujeme model s globální abelovskou symetrií pro dva nehmotné fermiony interagující s komplexním skalárním polem. Ukážeme, že Schwinger-Dysonovy rovnice pro fermionový a bosonový propagátor připouštějí ultrafialově konečné řešení narušující chirální symetrii, za předpokladu, že Yukawova interakce je dostatečně silná. Fermiony získají hmotu a elementárními excitacemi komplexního skalárního pole jsou dvě reálné bezspinové částice s různými hmotami. Jako nutný důsledek dynamického narušení chirální symetrie se ve spektru objeví Nambu-Goldstoneův boson jako kolektivní excitace fermionových i bosonového pole. (cs)
  • We 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.
  • We 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. (en)
Title
  • Dynamical fermion mass generation by a strong Yukawa interaction
  • Dynamical fermion mass generation by a strong Yukawa interaction (en)
  • Dynamické generování fermionových hmot silnou Yukawovou interakcí (cs)
skos:prefLabel
  • Dynamical fermion mass generation by a strong Yukawa interaction
  • Dynamical fermion mass generation by a strong Yukawa interaction (en)
  • Dynamické generování fermionových hmot silnou Yukawovou interakcí (cs)
skos:notation
  • RIV/61389005:_____/05:00025831!RIV06-AV0-61389005
http://linked.open.../vavai/riv/strany
  • 045007
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GD202/05/H003), P(LA 080), Z(AV0Z10480505)
http://linked.open...iv/cisloPeriodika
  • 4
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 518939
http://linked.open...ai/riv/idVysledku
  • RIV/61389005:_____/05:00025831
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • dynamical mass generation; Yukawa interaction (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [F456C7096062]
http://linked.open...i/riv/nazevZdroje
  • Physical Review D: Particles and Fields
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 72
http://linked.open...iv/tvurceVysledku
  • Hošek, Jiří
  • Brauner, Tomáš
http://linked.open...n/vavai/riv/zamer
issn
  • 0556-2821
number of pages
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