分析QGP相变级次的一种可能方法

A Poissible Method to Determine the Order of QGP Phase Transitions

在推广的Ginzburg Landau理论框架内 ,解析地研究了在QGP转化为强子的相变过程中多重数差关联矩Fq 与相空间间隔δ的依赖关系 ,提出了一种在实验中判断QGP相变级次的可能方法 .此方法的特点在于它不依赖系统温度这个未知的参量 ,对于低维和高维的实验数据均可以得出相同的相变信息 .

In the framework of the extended Ginzburg Landau model,the dependence of the multiplicity difference correlators F q on phase space intervals δ is different in first and second order QGP phase transitions.Once ln F q are expressed as functions of δ 1/3 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 the same information about the phase transition from one and higher dimensional analyses of the experimental data.