化学非平衡夸克-胶子物质中等质量双轻子的产生

Intermediate mass dilepton production in a chemically non-equilibrated quark-gluon matter

研究了正在进行化学平衡的富重子夸克 胶子物质的双轻子产生 ,发现由于产生在RHIC能量的化学非平衡的富重子夸克 胶子物质冷却慢和高的初始温度 ,导致中等质量双轻子产生重大增强 .因此 ,中等质量双轻子的增强可以是夸克 胶子物质形成的信号 .同时 ,这个增强能补偿由于初始夸克化学势增加引起的双轻子抑制 ,因而双轻子产额的抑制不再是夸克 胶子物质产生的信号 .

We have studied dilepton production during the chemical equilibration of baryon-rich quark-gloun matter, and found that due to the slowing down of the cooling rate and the high initial temperature of the quark-gloun matter(QGM) produced at RHIC energies, the quark phase contribution to dileptons with intermediate masses is significantly heightened, thus, the enhancement of dileptons with intermediate masses should be an signal for the QGM formation. Since this enhancement can compensate the dilepton suppression caused by increasing the initial chemical potential, therefore, the dilopton suppression may not be a signal for the quark-gloun matter formation.