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arXiv 1809.07594nucl-thhep-ph
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Nambu-Jona-Lasinio模型中衰变率和散射过程的输运响应

Transport responses from rate of decay and scattering processes in the Nambu--Jona-Lasinio model

Sabyasachi Ghosh, Fernando E. Serna, Aman Abhishek, Gastao Krein, Hiranmaya Mishra

摘要:

考虑介质中不同的弹性和非弹性散射,计算了夸克和反夸克的弛豫时间。这些弹性和非弹性散射不同的传输系数的比较作用进行了探讨。在Nambu-Jona-Lasinio模型的框架下,用夸克-介子有效相互作用的拉格朗日密度计算了这两种散射。由于动力学阈值的存在,非弹性散射只能存在于温度和化学势平面内的Mott线之外,而弹性散射则发生在整个平面内。有趣的是,Mott线附近和上方的非弹性散射的强度变得如此之强,以至于介质表现得像一个完美的流体,所有的输运系数变得非常小。

英文摘要:

We have calculated quark and anti-quark relaxation time by considering different possible elastic and inelastic scatterings in the medium. Comparative role of these elastic and inelastic scatterings on different transport coefficients are explored. The quark-meson effective interaction Lagrangian density in the framework of Nambu--Jona-Lasinio model is used for calculating both type of scatterings. Owing to a kinetic threshold, inelastic scatterings can only exist beyond the Mott line in temperature and chemical potential plane, whereas elastic scatterings occur in the entire plane. Interestingly, the strength of inelastic scatterings near and above Mott line becomes so strong that medium behaves like a perfect fluid, in that all transport coefficients become very small.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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