Geodesic
Meson correlation functions for a~model with nonlocal four-fermion interaction
Teoretičeskaâ i matematičeskaâ fizika, Tome 161 (2009) no. 3, pp. 406-419

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We study meson correlation functions for several models with a four-fermion quark interaction. We show that although the system average energy and quark condensate, as previously noted, are singular, the meson observables are finite, completely recognizable, and comparable to the experimental data on the energy scale. This permits using a wide set of Hamiltonians to model nonequilibrium states of quark and hadronic systems, which is a relevant problem in studying the physics of ultrarelativistic heavy-ion collisions. We obtain analytic expressions for the meson correlation functions in the Keldysh model.
Keywords: meson correlation function, Keldysh model.
Mots-clés : nonlocal four-fermion interaction 
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     author = {M. K. Volkov and G. M. Zinovjev and S. V. Molodtsov},
     title = {Meson correlation functions for a~model with nonlocal four-fermion interaction},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {406--419},
     publisher = {mathdoc},
     volume = {161},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_161_3_a8/}
}
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M. K. Volkov; G. M. Zinovjev; S. V. Molodtsov. Meson correlation functions for a~model with nonlocal four-fermion interaction. Teoretičeskaâ i matematičeskaâ fizika, Tome 161 (2009) no. 3, pp. 406-419. http://geodesic.mathdoc.fr/item/TMF_2009_161_3_a8/