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arXiv 1909.07421hep-phastro-ph.HEnucl-th
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再看有限重子密度下的Polyakov圈Nambu-Jona-Lasinio模型

Second look to the Polyakov Loop Nambu-Jona-Lasinio model at finite baryonic density

O. Ivanytskyi, M. Ángeles Pérez-García, V. Sagun, C. Albertus

摘要:

我们重新审视了Polyakov环路耦合Nambu-Jona-Lasinio模型,该模型在零温度的极限下保持了Polyakov环路动力学。这对中子星内部的天体物理应用是有意义的。为此,我们重新研究了有限重子密度下解禁闭序参量的势的形式。由于在任何温度下修改这个潜在的正式相当于分配一个重子电荷胶子,我们开发了一个更一般的制定本模型,治愈这种虚假的影响,并规范化,以匹配的渐近行为的QCD状态方程给出的$\mathcal{O}(α_s^2)$和部分$\mathcal{O}(α_s^3\ln^2α_s)$微扰结果。

英文摘要:

We revisit the Polyakov Loop coupled Nambu-Jona-Lasinio model that maintains the Polyakov loop dynamics in the limit of zero temperature. This is of interest for astrophysical applications in the interior of neutron stars. For this purpose we re-examine the form of the potential for the deconfinement order parameter at finite baryonic densities. Since the modification of this potential at any temperature is formally equivalent to assigning a baryonic charge to gluons, we develop a more general formulation of the present model that cures this spurious effect and is normalized to match the asymptotic behaviour of the QCD equation of state given by $\mathcal{O}(α_s^2)$ and partial $\mathcal{O}(α_s^3\ln^2α_s)$ perturbative results.

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