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arXiv 1106.4044hep-ph
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来自太阳的违反同位旋的暗物质和中微子

Isospin-Violating Dark Matter and Neutrinos From the Sun

Shao-Long Chen, Yue Zhang

摘要:

在一类暗物质-核子自旋无关相互作用破坏同位旋对称性的理论中,我们研究了通过太阳中心湮灭的中微子通量间接探测暗物质。我们指出,当氙等重靶的直接探测边界被削弱并与DAMA和CoGeNT实验中的正信号相一致时,如果湮灭是由重夸克或$τ$ -轻子末态主导的,那么中微子望远镜的间接探测会对这种解释施加相对较强的约束并带来张力.因此,符合条件的违反同位旋的暗物质候选者必须优先湮灭为轻物质。

英文摘要:

We study the indirect detection of dark matter through neutrino flux from their annihilation in the center of the Sun, in a class of theories where the dark matter-nucleon spin-independent interactions break the isospin symmetry. We point out that, while the direct detection bounds with heavy targets like Xenon are weakened and reconciled with the positive signals in DAMA and CoGeNT experiments, the indirect detection using neutrino telescopes can impose a relatively stronger constraint and brings tension to such explanation, if the annihilation is dominated by heavy quark or $τ$-lepton final states. As a consequence, the qualified isospin violating dark matter candidate has to preferably annihilate into light flavors.

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