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arXiv 0909.2348hep-ph
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在中微子望远镜上研究轻中性子

Investigating light neutralinos at neutrino telescopes

V. Niro, A. Bottino, N. Fornengo, S. Scopel

摘要:

我们提出了一个详细的分析中微子诱导μ介子信号来自中性伴子对湮灭内的太阳和地球,特别强调轻中性伴子。考虑的理论模型是一个有效的MSSM没有高吉诺质量统一,它允许轻质量的中性伴子(低于50 GeV)。使用超级神冈探测器的几何形状,将μ子事件分为贯穿μ子和停止μ子。在信号的评估,我们考虑到相关的强子和天体物理学的不确定性,包括中微子振荡和传播特性在一个一致的方式。我们得出的范围内的中微子质量可以探索中微子望远镜与低μ子能量阈值(约1 GeV)取决于事件的类别和各种天体物理和粒子物理参数的值。最后的分析集中在向上的μ介子通量,这可能是由那些中性伴子配置,能够解释的DAMA/LIBRA实验的年度调制数据产生的。我们展示了如何将这些数据与中微子望远镜的测量相结合,可以帮助确定DM粒子的特征,并限制许多数量(天体物理学和粒子物理学起源)的范围,这些数量在评估中仍然存在很大的不确定性。

英文摘要:

We present a detailed analysis of the neutrino-induced muon signals coming from neutralino pair-annihilations inside the Sun and the Earth with particular emphasis for light neutralinos. The theoretical model considered is an effective MSSM without gaugino-mass unification, which allows neutralinos of light masses (below 50 GeV). The muon events are divided in through-going and stopping muons, using the geometry of the Super-Kamiokande detector. In the evaluation of the signals, we take into account the relevant hadronic and astrophysics uncertainties and include neutrino oscillation and propagation properties in a consistent way. We derive the ranges of neutralino masses which could be explored at neutrino telescopes with a low muon-energy threshold (around 1 GeV) depending on the category of events and on the values of the various astrophysics and particle-physics parameters. A final analysis is focussed to the upward muon fluxes which could be generated by those neutralino configurations which are able to explain the annual modulation data of the DAMA/LIBRA experiment. We show how combining these data with measurements at neutrino telescopes could help in pinning down the features of the DM particle and in restraining the ranges of the many quantities (of astrophysics and particle-physics origins) which enter in the evaluations and still suffer from large uncertainties.

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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