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

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) over barq) and diquark (qq) condensates. In particular, it is shown that there exists a critical value H-c of the external chromomagnetic field such that at H>H-c 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.