Two-particle interferometry for the sources undergoing a first-order QCD phase transition in high-energy heavy ion collisions
Two-particle interferometry for the sources undergoing a first-order QCD phase transition in high-energy heavy ion collisions
复制标题
高能重离子碰撞中经历一阶 QCD 相变源的双粒子干涉测量
DOI:
10.1103/physrevc.86.024914
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发表时间:
2012-05
影响因子:
3.1
通讯作者:
Yu, Li-Li
中科院分区:
文献类型:
--
作者:
Yin, Hong-Jie;Yang, Jing;Zhang, Wei-Ning;Yu, Li-Li
We investigate the two-particle interferometry for the particle-emitting sources that undergo the first-order phase transition from the quark-gluon plasma with a finite baryon chemical potential to hadron resonance gas. The effects of source expansion, lifetime, and particle absorption on the transverse interferometry radii ${R}_{\mathrm{out}}$ and ${R}_{\mathrm{side}}$ are examined. We find that the emission durations of the particles become large when the system is initially located at the boundary between the mixed phase and the quark-gluon plasma. In this case, the difference between the radii ${R}_{\mathrm{out}}$ and ${R}_{\mathrm{side}}$ increases with the transverse momentum of the particle pair significantly. The ratio of $\sqrt{{R}_{\mathrm{out}}^{2}\ensuremath{-}{R}_{\mathrm{side}}^{2}}$ to the transverse velocity of the pair is an observable for the enhancement of the emission duration.
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DOI:
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期刊:
Physics Reports
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