| Popis: |
In this paper the influence of chiral chemical potential μ5 on the phenomenon of diquark condensation and phase structure of dense quark matter altogether is contemplated in the framework of the effective 2-color and 2-flavor Nambu–Jona-Lasinio model. The nonzero values of baryon μB, isospin μI and chiral isospin μI5 chemical potentials are also taken into account. We show that the duality relations between diquark condensation, charged pion condensation, and chiral symmetry breaking phenomena, found in the case of zero μ5, are also valid for any value of μ5≠0. In terms of dualities and the influence on the phase diagram, chiral imbalance μ5 stands alone from other chemical potentials. Indeed, in comparison with other chemical potentials, μ5 has two interesting features. (i) In the region of moderate values of μB, μI, and μI5 it manifests itself as a universal catalyst, since it enhances just the phase that is realized in the system at μ5=0. (ii) In the second regime, when several other chemical potentials reach rather large values, one could observe a rather complicated and rich phase structure, and chiral chemical potential μ5 can be a factor that not so much catalyzes as triggers rather peculiar phases. |
