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Phase transition of the first kind with respect to the density in a model of spontaneous breaking of chiral symmetry
Teoretičeskaâ i matematičeskaâ fizika, Tome 75 (1988) no. 3, pp. 465-472 Cet article a éte moissonné depuis la source Math-Net.Ru

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A model of the spontaneous breaking of chiral symmetry motivated by quantum chromodynamics is considered at a finite density of the quarks and zero temperature. For zero chemical potential the dynamical quark mass, the bag constant, and the vacuum expectation value $\langle\bar qq\rangle$ are estimated. The dependence of the grand thermodynamic potential on the chemical potential of the quarks and of the energy on the particle number density are calculated. It is found that there is a phase transition of the first kind with respect to the density of the quarks accompanied by restoration of the chiral symmetry. The critical values of the fermion density are found. 
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     author = {N. P. Bogolyubov},
     title = {Phase transition of the first kind with respect to the density in a~model of spontaneous breaking of chiral symmetry},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {465--472},
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     volume = {75},
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     url = {http://geodesic.mathdoc.fr/item/TMF_1988_75_3_a13/}
}
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N. P. Bogolyubov. Phase transition of the first kind with respect to the density in a model of spontaneous breaking of chiral symmetry. Teoretičeskaâ i matematičeskaâ fizika, Tome 75 (1988) no. 3, pp. 465-472. http://geodesic.mathdoc.fr/item/TMF_1988_75_3_a13/

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