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arXiv 1508.04136hep-phastro-ph.COhep-th
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类轴子粒子通过导数相互作用的非微扰超生

Non-perturbative over-production of axion-like-particles (ALPs) via derivative interaction

Anupam Mazumdar, Saleh Qutub

摘要:

类轴子粒子(Axion like particles,ALP)是标准模型以外的物理学中的一种常见粒子,是一种赝标量南武-戈德斯通玻色子,一旦全局$U(1)$对称性自发破缺,就会出现。ALP可以从各种非微扰的量子效应中获得质量,例如异常或瞬子。ALP可以通过导数相互作用耦合到包含标量凝聚体(如暴胀子或模场)的物质扇区,而轴子{ \it衰变常数} $f_χ$抑制了导数相互作用.虽然弱相互作用,ALP可以产生大量的均匀凝聚体的相干振荡。在本文中,我们将研究这样一种情况,即ALP可以大量产生,在某些情况下,甚至可以通过奇数和偶数维算子过接近宇宙,只要$f_χ/Φ_{\rm I} \ll 1$,其中$Φ_{\rm I}$表示标量凝聚体$ϕ$相干振荡的初始振幅。我们将简要地提到这种危险的生产过剩将如何影响宇宙中的暗物质和暗辐射丰度。

英文摘要:

Axion like particles (ALPs) are quite generic in many scenarios for physics beyond the Standard Model, they are pseudoscalar Nambu-Goldstone bosons, and appear once any global $U(1)$ symmetry is broken spontaneously. The ALPs can gain mass from various non-perturbative quantum effects, such as anomalies or instantons. ALPs can couple to the matter sector incluidng a scalar condensate such as inflaton or moduli field via derivative interactions, which are suppressed by the axion {\it decay constant}, $f_χ$ . Although weakly interacting, the ALPs can be produced abundantly from the coherent oscillations of a homogeneous condensate. In this paper we will study such a scenario where the ALPs can be produced abundantly, and in some cases can even overclose the Universe via odd and even dimensional operators, as long as $f_χ/Φ_{\rm I} \ll 1$, where $Φ_{\rm I}$ denotes the initial amplitude of the coherent oscillations of the scalar condensate, $ϕ$. We will briefly mention how such dangerous overproduction would affect dark matter and dark radiation abundances in the Universe.

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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