Three-dimensional (psi anti-psi)**2 model with an external nonAbelian field, temperature and chemical potential
Mar, 1993
14 pages
Published in:
- Nuovo Cim.A 107 (1994) 439-452
DOI:
Report number:
- IFVE-93-33
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Abstract: (Springer)
The phase structure of the four-fermion model (1) under the action of an external chromomagnetic fieldH, temperatureT and a chemical potential Μ has been studied in three dimensions. It has been shown that: 1) the conditionsH ⊋ 0,T, Μ = 0 lead unavoidably to a spontaneous breakdown of the chiral invariance; 2) the chiral symmetry can be restored at sufficiently largeT or Μ values. The expressions for the critical temperature and quark mass in the range of large and small external field values have been derived.- four-fermion interaction
- dimension: 3
- gauge field theory: SU(N)
- field theory: scalar
- critical phenomena
- finite temperature
- effective potential
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