Properties of the massive Gross-Neveu model with nonzero baryon and isospin chemical potentials

Details Properties of the massive Gross-Neveu model with nonzero baryon and isospin chemical potentials Properties of the massive Gross-Neveu model with nonzero baryon and isospin chemical potentials

2009-11-10

arxiv.org/abs/0911.1944v2

Phys.Rev.D80:125013,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 8 figures, two references added

Scientific paper

10.1103/PhysRevD.80.125013

The properties of the two-flavored Gross-Neveu model with nonzero current quark mass are investigated in the (1+1)-dimensional spacetime at finite isospin $\mu_I$ as well as quark number $\mu$ chemical potentials and zero temperature. The consideration is performed in the limit $N_c\to\infty$, i.e. in the case with an infinite number of colored quarks. In the plane of parameters $\mu_I,\mu$ a rather rich phase structure is found, which contains phases with and without pion condensation. We have found a great variety of one-quark excitations of these phases, including gapless and gapped quasiparticles. Moreover, the mesonic mass spectrum in each phase is also investigated.

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