Chiral phase transition in a lattice fermion--gauge--scalar model with U(1) gauge symmetry

Details Chiral phase transition in a lattice fermion--gauge--scalar model with U(1) gauge symmetry Chiral phase transition in a lattice fermion--gauge--scalar model with U(1) gauge symmetry

1995-05-18

arxiv.org/abs/hep-lat/9505013v1

Nucl.Phys. B453 (1995) 355-374

Physics

High Energy Physics

High Energy Physics - Lattice

20 pages, latex2e, 15 PostScript figures included, all files tared, compressed and uudecoded

Scientific paper

10.1016/0550-3213(95)00378-6

The chiral phase transition induced by a charged scalar field is investigated numerically in a lattice fermion-gauge-scalar model with U(1) gauge symmetry, proposed recently as a model for dynamical fermion mass generation. For very strong gauge coupling the transition is of second order and its scaling properties are very similar to those of the Nambu--Jona-Lasinio model. However, in the vicinity of the tricritical point at somewhat weaker coupling, where the transition changes the order, the scaling behavior is different. Therefore it is worthwhile to investigate the continuum limit of the model at this point.

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