体材料中具有幂律变色龙标量场的QCD相变
QCD phase transition with a power law chameleon scalar field in the bulk
摘要：
本文采用膜上为理想流体、体上为标量场的膜世界模型研究夸克-强子相变。体标量场与膜物质有相互作用。这种相互作用形成非守恒关系，描述了体膜之间的能量转移。由于夸克-强子跃迁与演化方程的形式密切相关，因此对能量守恒方程和Friedmann方程的修正得到了关于跃迁时间的一些有趣结果。利用交叉形式主义和一阶相变形式主义，研究了与早期定量有关的物理量的演化，即能量密度、温度和标度因子。结果表明，夸克-强子相变发生在大爆炸后的纳秒左右，两种形式下的一般行为温度相似。
英文摘要：
In this work, a brane world model with a perfect fluid on brane and a scalar field on bulk has been used to study quark-hadron phase transition. The bulk scalar field has an interaction with brane matter. This interaction comes into non-conservation relation which describe an energy transfer between bulk and brane. Since quark-hadron transition curly depends on the form of evolution equations therefore modification of energy conservation equation and Friedmann equation comes into some interesting results about the time of transition. The evolution of physical quantities relevant to quantitative of early times namely energy density $ρ$ temperature $T$ and scale factor $a$ have been considered utilizing two formalisms as crossover formalism and first order phase transition formalism. The results show that the quark-hadron phase transition in occurred about nanosecond after big bang and the general behavior temperature is similar in both of two formalism.
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