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arXiv 0908.2430astro-ph.COgr-qchep-phhep-th
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非热WIMP奇迹

A Non-thermal WIMP Miracle

Bobby Samir Acharya, Piyush Kumar, Gordon Kane, Scott Watson

摘要:

只有引力强度耦合的光标量场通常存在于标准模型之外的紫外完备物理理论中。在早期宇宙中,这些场自然会主导能量密度,而它们随后的衰变,如果在BBN之前,通常会在它们的衰变产物中产生一些暗物质粒子。在本文中,我们观察到,一个非热的WIMP“奇迹”可能会导致:即,在最简单的宇宙学模量问题的解决方案,非热产生的WIMP可以自然地解释所观察到的暗物质遗迹密度。这样的解在弦论紧化中可能是通用的。

英文摘要:

Light scalar fields with only gravitational strength couplings are typically present in UV complete theories of physics beyond the Standard Model. In the early universe it is natural for these fields to dominate the energy density, and their subsequent decay, if prior to BBN, will typically yield some dark matter particles in their decay products. In this paper we make the observation that a Non-thermal WIMP `Miracle' may result: that is, in the simplest solution to the cosmological moduli problem, non-thermally produced WIMPs can naturally account for the observed dark matter relic density. Such a solution may be generic in string theory compactifications.

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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