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arXiv 0903.4677hep-phastro-ph.CO
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NMSSM中的右手中微子暗物质

Right-handed sneutrino dark matter in the NMSSM

David G. Cerdeno, Osamu Seto

摘要:

我们研究的右手sneutrino的属性和它的可行性作为一个WIMP暗物质候选人在扩展版本的NMSSM,其中一个右手中微子超场是包括耦合到单重态希格斯,以提供非零的马约拉纳中微子质量。我们进行了系统的研究参数空间,包括LEP约束和实验界的低能量观测。我们调查的条件下,右手sneutrino有正确的遗迹丰度和占主导地位的湮灭渠道。接下来我们计算了中微子-质子弹性散射截面的理论预测,并将其与目前和未来的实验灵敏度进行了比较。我们发现,在5-200 GeV的范围内的质量的sneutrinos可以重现所观察到的暗物质遗迹密度,而不排除直接暗物质搜索和输入参数的自然值。有趣的是,预测的散射截面一般是在未来的实验范围内。最后,我们评论的对撞机物理的可能影响。

英文摘要:

We study the properties of the right-handed sneutrino and its viability as a WIMP dark matter candidate in an extended version of the NMSSM in which a right-handed neutrino superfield is included with a coupling to the singlet Higgs in order to provide non-vanishing Majorana neutrino masses. We perform a systematic study of the parameter space, including LEP constraints and experimental bounds on low-energy observables. We investigate the conditions under which the right-handed sneutrino has the correct relic abundance and the dominant annihilation channels. Next we calculate the theoretical predictions for the sneutrino-proton elastic scattering cross section and compare it with present and future experimental sensitivities. We find that sneutrinos with a mass in the range of 5-200 GeV can reproduce the observed dark matter relic density without being excluded by direct dark matter searches and for natural values of the input parameters. Interestingly, the predicted scattering cross section is generally within the reach of future experiments. Finally, we comment on the possible implications for collider physics.

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