In the framework of the extended Ginzburg-Landau model, the dependence of the multiplicity difference correlators Fq on phase space intervals δ is different in first-and second-order QGP phase transitions. Once ln Fq are expressed as functions of δ1/3 and data-fitting by polynomials, one can determine the order of the phase transition by comparing the signs of the coefficients of the first power from fitting and from theoretical calculations. One virtue of this method is the independence of the unknown temperature parameter, and one can get t...
