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arXiv 1507.07087hep-phastro-ph.SRnucl-th
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具有赝标凝聚的恒星物质

Stellar matter with pseudoscalar condensates

A. A. Andrianov, V. A. Andrianov, D. Espriu, S. S. Kolevatov

摘要:

在这项工作中,我们考虑如何在稠密系统中的赝标量凝聚体的梯度的外观可能会影响光子在这样的介质中的输运性质以及其他热力学特性。我们采用的假设,在赝标量密度梯度是大的区域的光子和费米子的属性是由通常的拉格朗日扩展与陈-西蒙斯相互作用的光子和费米子的恒定轴向场。我们发现,这些新的作品在拉格朗日产生非平凡的反射系数的光子和费米子时,进入或离开一个区域的赝标量具有非零梯度。变化的赝标密度也可能导致某些费米子和玻色子模的不稳定性,并改变费米海的某些性质。我们推测,其中一些修改可能会影响恒星物质的冷却速率(例如在致密恒星中),并产生其他可观察到的后果。虽然定量结果可能取决于精确的天体物理学细节,但大多数结果是相当普遍的,应考虑这种可能性。

英文摘要:

In this work we consider how the appearance of gradients of pseudoscalar condensates in dense systems may possibly influence the transport properties of photons in such a medium as well as other thermodynamic characteristics. We adopt the hypothesis that in regions where the pseudoscalar density gradient is large the properties of photons and fermions are governed by the usual lagrangian extended with a Chern-Simons interaction for photons and a constant axial field for fermions. We find that these new pieces in the lagrangian produce non-trivial reflection coefficients both for photons and fermions when entering or leaving a region where the pseudoscalar has a non-zero gradient. A varying pseudoscalar density may also lead to instability of some fermion and boson modes and modify some properties of the Fermi sea. We speculate that some of these modifications could influence the cooling rate of stellar matter (for instance in compact stars) and have other observable consequences. While quantitative results may depend on precise astrophysical details most of the consequences are quite universal and consideration should be given to this possibility.

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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