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arXiv 1207.0507hep-ph
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最小SUSY B-L模型中的暗物质方案

Dark matter scenarios in the minimal SUSY B-L model

Lorenzo Basso, Ben O'Leary, Werner Porod, Florian Staub

摘要:

我们进行了研究的暗物质候选人的约束版本的最小R-宇称守恒超对称模型与规范$U(1)_{B-L}$。事实证明,与MSSM相比,暗物质还有四个额外的候选者:两种中性伴子,它们要么对应于$U(1)_{B-L}$的高吉诺,要么对应于费米子双轻子,以及“右手”CP-偶和CP-奇超中微子。由于新的共湮灭区和共振等不同的机制,可以得到正确的中性伴子的暗物质遗迹密度。为了使$U(1)_{B-L}$辐射断裂,需要额外的大的汤川耦合,这常常导致超中微子的大的湮灭截面。规范动力学混合的正确处理对某些方案的成功至关重要。所有候选物均符合Xenon 100的排除限值。

英文摘要:

We perform a study of the dark matter candidates of a constrained version of the minimal R-parity-conserving supersymmetric model with a gauged $U(1)_{B-L}$. It turns out that there are four additional candidates for dark matter in comparison to the MSSM: two kinds of neutralino, which either correspond to the gaugino of the $U(1)_{B-L}$ or to a fermionic bilepton, as well as "right-handed" CP-even and -odd sneutrinos. The correct dark matter relic density of the neutralinos can be obtained due to different mechanisms including new co-annihilation regions and resonances. The large additional Yukawa couplings required to break the $U(1)_{B-L}$ radiatively often lead to large annihilation cross sections for the sneutrinos. The correct treatment of gauge kinetic mixing is crucial to the success of some scenarios. All candidates are consistent with the exclusion limits of Xenon100.

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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