论文标题
在高能量碰撞中提取不同温度和动力学冻结体积
Extraction of different temperatures and kinetic freeze-out volume in high energy collisions
论文作者
论文摘要
我们分析了横向动量（$ p_t $）光谱，$ 1/n_ {ev} $ [（（1/2 $π$$ P_T $）$热模型并提取了有效温度，动力学冷冻体积，初始温度和动力学冷冻温度的激发功能。我们认为，有效温度，初始温度和动力学冷冻温度从7.7 GEV急剧增加到14.5 GEV，然后从14.5-39 GEV保持静态，并且该一致性可能会揭示部分解切的相位转变的发作能量分别为14.5和39 GEV。动力学冻结体积和平均横向动量随碰撞能量的增加而增长。此外，在相互作用系统的时间演化中观察到不同的提取温度，并且它们（以及动力学冻结体积）的趋势从外围到中央碰撞越来越高。我们还观察到了有效温度和动力学冻结体积的质量依赖性，而前者的增加，而较重的颗粒的后期减小，这表明较重的颗粒的早期冻结。
We analyze the transverse momentum ($p_T$) spectra, $1/N_{ev}$[(1/2$π$$p_T$) $d^2$$N$/$dyd$$p_T$], of kaon, proton, deuteron and triton in different centrality events in gold-gold (Au-Au) collisions at Relativistic Heavy Ion Collisions (RHIC) by Hagedorn thermal model and extracted the excitation function of effective temperature, kinetic freeze-out volume, initial temperature and kinetic freeze-out temperature. We perceived that the effective temperature, initial temperature and kinetic freeze-out temperature sharply increases from 7.7 GeV to 14.5 GeV and then remain static from 14.5-39 GeV, and this consistency may disclose that the onset energy of the phase transition of partial deconfinement and the whole deconfinement are 14.5 and 39 GeV respectively. The kinetic freeze-out volume and mean transverse momentum grows with the rise of collision energy. Furthermore, the different extracted temperatures are observed in the order of time evolution of the interacting system, and they (as well as kinetic freeze-out volume) have an increasing trend from peripheral to central collisions. We also observed the mass dependence of the effective temperature and kinetic freeze-out volume where former increases while the later decreases for heavier particles, which indicates the early freeze-out of the heavier particles.
