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arXiv 0802.2433hep-ph
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有限化学势对火球形成统计模型中QGP-强子相变的影响

Effect of finite chemical potential on QGP-Hadron phase transition in a statistical model of fireball formation

R. Ramanathan, Agam k. Jha, K. k. Gupta, S. S. Singh

摘要:

在Ramanathan等人的统计模型(Phys.Rev.C70,027903,2004)中,我们研究了有限化学势对QGP组分的影响.而早期的计算表明,在170 MeV附近,该系统存在一个弱的一级相变(Pramana,68,757,2007),引入组分的化学势的有限值使得过渡是相的平滑翻转,同时允许发生半径为几个“费米”的火球形成。这似乎与最近关于QGP-强子相变性质的共识一致。关键词:夸克-胶子等离子体,夸克强子相变

英文摘要:

We study the effect of finite chemical potential for the QGP constituents in the Ramanathan et al. statistical model (Phys.Rev.C70, 027903,2004). While the earlier computations using this model with vanishing chemical potentials indicated a weakly first order phase transition for the system in the vicinity of 170 MeV (Pramana, 68, 757, 2007), the introduction of finite values for the chemical potentials of the constituents makes the transition a smooth roll over of the phases, while allowing fireball formation with radius of a few "fermi" to take place. This seems to be in conformity with the latest consensus on the nature of the QGP-Hadron phase transition. Keywords: Quark Gluon Plasma, Quark Hadron Phase Transition

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