Geodesic
A study of diquark and meson condensation in the Nambu–Jona-Lasinio model and Fermi momentum
Teoretičeskaâ i matematičeskaâ fizika, Tome 190 (2017) no. 1, pp. 104-111 Cet article a éte moissonné depuis la source Math-Net.Ru

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Using a three- and four-dimensional Pauli–Villars regularization scheme, we investigate quark–antiquark and diquark condensation in the framework of the Nambu–Jona-Lasinio model. Using the particle Fermi momentum as a cutoff parameter, we study the energy gap width and coherence length for the meson condensate $\langle q\bar q\rangle$. We also study the energy gap width and critical coherence length (the distance over which there would be no diquark condensation) for the diquark $\langle qq\rangle$ and the dependence on the Fermi momentum. We obtain an estimate of the Fermi momentum value for meson and diquark condensates with an energy gap width of the order of $100$ MeV.
Keywords: NJL model, meson condensation
Mots-clés : diquark condensation. 
@article{TMF_2017_190_1_a6,
     author = {R. Ghosh and A. Bhattacharya and B. Chakrabarti},
     title = {A~study of diquark and meson condensation in {the~Nambu{\textendash}Jona-Lasinio} model and {Fermi} momentum},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {104--111},
     year = {2017},
     volume = {190},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2017_190_1_a6/}
}
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R. Ghosh; A. Bhattacharya; B. Chakrabarti. A study of diquark and meson condensation in the Nambu–Jona-Lasinio model and Fermi momentum. Teoretičeskaâ i matematičeskaâ fizika, Tome 190 (2017) no. 1, pp. 104-111. http://geodesic.mathdoc.fr/item/TMF_2017_190_1_a6/