arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0706.4071hep-phastro-ph
收藏

最小暗物质的宇宙学和天体物理学

Cosmology and Astrophysics of Minimal Dark Matter

Marco Cirelli, Alessandro Strumia, Matteo Tamburini

摘要:

我们考虑DM只耦合到SM规范玻色子,并填充一个规范多重态,例如费米子5重态(这是自动稳定的),或一个类似维诺的3重态。我们重新计算宇宙学遗迹丰度,包括非微扰修正。例如,5重态的预测质量从4.4 TeV增加到10 TeV,间接检测率提高了2个数量级。接下来,我们证明,由于DM多重态的中性和带电成分之间的准简并性,能量E > 10 ^17 eV的DM(可能存在于超高能宇宙射线中)的很大一部分可以穿过地球,以带电状态离开,原则上可以在中微子望远镜中检测到。

英文摘要:

We consider DM that only couples to SM gauge bosons and fills one gauge multiplet, e.g. a fermion 5-plet (which is automatically stable), or a wino-like 3-plet. We revisit the computation of the cosmological relic abundance including non-perturbative corrections. The predicted mass of e.g. the 5-plet increases from 4.4 TeV to 10 TeV, and indirect detection rates are enhanced by 2 orders of magnitude. Next, we show that due to the quasi-degeneracy among neutral and charged components of the DM multiplet, a significant fraction of DM with energy E > 10^17 eV (possibly present among ultra-high energy cosmic rays) can cross the Earth exiting in the charged state and may in principle be detected in neutrino telescopes.

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。

↑