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arXiv 0911.4489hep-phastro-ph.HE
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中微子味的超中微子暗物质

Neutrino-Flavoured Sneutrino Dark Matter

John March-Russell, Christopher McCabe, Matthew McCullough

摘要:

研究了一个与中微子味物理自然相关的超对称暗物质(DM)的简单理论。DM部门包括一个光谱的混合lhd-rhd sneutrino状态的sneutrino味结构和质量分裂的相关中微子的质量和混合。由于非弹性分裂提供了一个大的中微子-核子截面(太阳捕获极限排除了DAMA/LIBRA的解释),从太阳捕获间接探测的前景是好的。我们发现参数区域,所有较重的状态将已衰变,只留下一个味道的混合物的sneutrino作为候选人DM。这些区域有一个独特的“确凿证据”-太阳中的中微子湮灭产生一对中微子质量本征态,不受真空振荡的影响,有可能通过中微子望远镜观测nu_mu和nu_tau的硬谱(对于正常的中微子等级)而被探测到。下一代直接探测实验可以通过弹性和非弹性散射探索大部分参数空间。我们详细地表明,所观察到的中微子质量和混合可以出现的超对称性破缺效应在sneutrino DM部门的后果,符合所有的实验约束。

英文摘要:

A simple theory of supersymmetric dark matter (DM) naturally linked to neutrino flavour physics is studied. The DM sector comprises a spectrum of mixed lhd-rhd sneutrino states where both the sneutrino flavour structure and mass splittings are determined by the associated neutrino masses and mixings. Prospects for indirect detection from solar capture are good due to a large sneutrino-nucleon cross-section afforded by the inelastic splitting (solar capture limits exclude an explanation of DAMA/LIBRA). We find parameter regions where all heavier states will have decayed, leaving only one flavour mixture of sneutrino as the candidate DM. Such regions have a unique `smoking gun' signature--sneutrino annihilation in the Sun produces a pair of neutrino mass eigenstates free from vacuum oscillations, with the potential for detection at neutrino telescopes through the observation of a hard spectrum of nu_mu and nu_tau (for a normal neutrino hierarchy). Next generation direct detection experiments can explore much of the parameter space through both elastic and inelastic scattering. We show in detail that the observed neutrino masses and mixings can arise as a consequence of supersymmetry breaking effects in the sneutrino DM sector, consistent with all experimental constraints.

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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