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arXiv 1807.09795hep-phastro-ph.COhep-th
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经典非相对论性有效场论和引力相互作用的作用

Classical Nonrelativistic Effective Field Theory and the Role of Gravitational Interactions

Joshua Eby, Kyohei Mukaida, Masahiro Takimoto, L. C. R. Wijewardhana, Masaki Yamada

摘要:

轴子或类轴子粒子的相干振荡可能会产生长寿命的团块,称为轴子星,这是由于引力吸引力或其自相互作用。这类组态已在无引力作用的介子中被广泛研究,其稳定性可由非相对论性有效场论(EFT)中粒子数的近似守恒来理解。我们将这种分析扩展到引力的情况下,讨论轴子星的寿命,并澄清梯度能量和牛顿常数方面的EFT扩展计划。我们的EFT是有用的计算轴子星的配置和它的经典寿命没有任何特别的假设。此外,我们推导出一个简单的小扰动稳定性条件。最后,我们讨论了文献中提出的其他非相对论性有效场论的一致性。

英文摘要:

Coherent oscillation of axions or axion-like particles may give rise to long-lived clumps, called axion stars, because of the attractive gravitational force or its self-interaction. Such a kind of configuration has been extensively studied in the context of oscillons without the effect of gravity, and its stability can be understood by an approximate conservation of particle number in a non-relativistic effective field theory (EFT). We extend this analysis to the case with gravity to discuss the longevity of axion stars and clarify the EFT expansion scheme in terms of gradient energy and Newton's constant. Our EFT is useful to calculate the axion star configuration and its classical lifetime without any ad hoc assumption. In addition, we derive a simple stability condition against small perturbations. Finally, we discuss the consistency of other non-relativistic effective field theories proposed in the literature.

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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