Chromomagnetic catalysis of color superconductivity in a (2+1)-dimensional Nambu–Jona-Lasinio model

D. Ebert; K. G. Klimenko; H. Toki

doi:10.1103/PhysRevD.64.014038

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Chromomagnetic catalysis of color superconductivity in a (2+1)-dimensional Nambu–Jona-Lasinio model

D. Ebert, K. G. Klimenko, H. Toki

DOI 10.1103/PhysRevD.64.014038 · Physical Review D

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Abstract

We investigate the influence of a constant uniform external chromomagnetic field H on the formation of color superconductivity. The consideration is made in the framework of a (2+1)-dimensional Nambu–Jona-Lasinio model with two different four-fermionic structures responsible for 〈q¯q〉 and diquark 〈qq〉 condensates. In particular, it is shown that there exists a critical value Hc of the external chromomagnetic field such that at H>Hc a nonvanishing diquark condensate is dynamically created (the so-called chromomagnetic catalysis effect of color superconductivity). Moreover, external chromomagnetic fields may in some cases enhance the diquark condensate of color superconductivity.