18-24 June 2017
Palacio de Congresos
Europe/Madrid timezone
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Seminarios 1+2
Applications Beyond QCD

Phases of a strongly coupled four-fermion theory


  • Dr. David SCHAICH

Primary authors


I will present recent and ongoing investigations of a four-dimensional lattice field theory with four massless reduced staggered fermions coupled through an SU(4)-invariant four-fermion interaction. As in previous studies of four-fermion and Higgs--Yukawa models with different lattice fermion discretizations, we observe a strong-coupling phase in which the system develops a mass gap without breaking any lattice symmetry. In contrast to those previous studies we do not observe the formation of a symmetry-breaking bilinear condensate for any value of the coupling. Instead of a broken intermediate phase we find evidence for one or more continuous phase transitions separating the symmetric weak- and strong--coupling regimes.

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Applications Beyond QCD