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arXiv 1702.01141hep-ph
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暗物质束缚态的宇宙学意义

Cosmological Implications of Dark Matter Bound States

Andrea Mitridate, Michele Redi, Juri Smirnov, Alessandro Strumia

摘要:

我们提出了通用公式计算索末菲修正与束缚态的形成如何影响非阿贝尔规范相互作用的暗物质的热丰度。我们认为DM是SU(2)$_L$下的费米子3重态(wino)或5重态。在后一种情况下,束缚态将DM质量提高到14 TeV,以再现宇宙学DM丰度,并给出间接检测信号,例如(对于此质量)在85 GeV附近的主导$γ$ -线。此外,我们认为DM与有色粒子(如夸克或胶子)共零化,发现束缚态效应在后一种情况下尤其相关。

英文摘要:

We present generic formulae for computing how Sommerfeld corrections together with bound-state formation affects the thermal abundance of Dark Matter with non-abelian gauge interactions. We consider DM as a fermion 3plet (wino) or 5plet under SU(2)$_L$. In the latter case bound states raise to 14 TeV the DM mass required to reproduce the cosmological DM abundance and give indirect detection signals such as (for this mass) a dominant $γ$-line around 85 GeV. Furthermore, we consider DM co-annihilating with a colored particle, such as a squark or a gluino, finding that bound state effects are especially relevant in the latter case.

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