Precursor of color superconductivity in hot quark matter

We investigate possible precursory phenomena of color superconductivity in quark matter at finite temperature T with use of a simple Nambu-Jona-Lasinio model. It is found that the fluctuating pair field exists with a prominent strength even well above the critical temperature T_c. We show that the collective pair field has a complex energy located in the second Riemann sheet, which approaches the origin as T is lowered to T_c. We discuss the possible relevance of the precursor to the observables to be detected in heavy ion collisions.

11.15.Ex
25.75.-q
74.40.+k
12.38.Mh
quark: matter
finite temperature
color: superconductivity
Jona-Lasinio-Nambu model
critical phenomena
spectral representation

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