Precursor of color superconductivity Original Research Article

We investigate possible precursory phenomena of color superconductivity at finite temperature T with an effective theory of QCD. It is found that the fluctuation of the diquark pair field exists with a prominent strength even well above the critical temperature Tc. We show that such a fluctuation forms a collective mode, the corresponding pole of which approaches the origin as T is lowered to Tc in the complex energy plane. We discuss the possible relevance of the precursor to the observables to be detected in heavy-ion collisions.