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arXiv 0901.3485hep-ph
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极轻中微子的质量界限

Mass Bounds on a Very Light Neutralino

H. K. Dreiner, S. Heinemeyer, O. Kittel, U. Langenfeld, A. M. Weber, G. Weiglein

摘要:

在最小超对称标准模型(MSSM)中,我们系统地研究了最轻中性伴子的质量边界。我们考虑到非普适的高根质量,因此甚至考虑无质量的中性伴子,同时假设一般的R宇称是守恒的。我们主要关注的是实验室的限制。我们考虑对撞机的数据,精密的观测,也罕见的介子衰变到非常轻的中性伴子。然后我们讨论天体物理学和宇宙学的影响。我们发现,一个无质量的中性伴子是允许的所有现有的实验数据和天体物理学和宇宙学观测。

英文摘要:

Within the Minimal Supersymmetric Standard Model (MSSM) we systematically investigate the bounds on the mass of the lightest neutralino. We allow for non-universal gaugino masses and thus even consider massless neutralinos, while assuming in general that R-parity is conserved. Our main focus are laboratory constraints. We consider collider data, precision observables, and also rare meson decays to very light neutralinos. We then discuss the astrophysical and cosmological implications. We find that a massless neutralino is allowed by all existing experimental data and astrophysical and cosmological observations.

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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