The gauged Nambu-Jona Lasinio model: a mean field calculation with nonmean field exponents
We analyse the phase diagram of the lattice gauged Nambu-Jona Lasinio model with the help of a mean field approximation plus numerical simulations. We find a phase transition line in the coupling parameters space separating the chirally broken phase from the symmetric phase, which is in good qualita...
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Published in | Physics letters. B Vol. 355; no. 1; pp. 270 - 276 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
27.07.1995
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Online Access | Get full text |
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Summary: | We analyse the phase diagram of the lattice gauged Nambu-Jona Lasinio model with the help of a mean field approximation plus numerical simulations. We find a phase transition line in the coupling parameters space separating the chirally broken phase from the symmetric phase, which is in good qualitative agreement with results obtained in the quenched-ladder approximation. The mean field approximation relates the critical exponents along the continuous phase transition line with the mass dependence of the chiral condensate in the Coulomb phase of standard noncompact QED. Our numerical results for noncompact QED strongly suggest nonmean field exponents along the critical line. |
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ISSN: | 0370-2693 1873-2445 |
DOI: | 10.1016/0370-2693(95)00717-Y |