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arXiv 2102.08986hep-ph
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具有RH中微子超场的NMSSM中的暗物质候选者

Dark matter candidates in the NMSSM with RH neutrino superfields

Daniel E. Lopez-Fogliani, Andres D. Perez, Roberto Ruiz de Austri

摘要:

具有右手中微子的R宇称守恒超对称模型是非常有吸引力的,因为它们可以自然地解释中微子物理,也提供了一个很好的暗物质候选者,如最轻的超对称粒子。在这项工作中,我们考虑下一个最小的超对称标准模型(NMSSM)加RH中微子超场,有效马约拉纳质量动态产生的电弱标度(EW)。我们进行扫描的相关参数空间和研究两个可能的DM候选人:RH sneutrino和neutralino。特别是对于RH超中微子DM的情况,我们分析了两个候选者之间的密切关系,以获得正确的残余密度。除了众所周知的共振,通过标量四次耦合和共湮灭机制与各种中性伴子的湮灭是至关重要的。最后,我们提出了当前和未来的直接和间接检测实验对两个DM候选人的影响。

英文摘要:

R-parity conserving supersymmetric models with right-handed (RH) neutrinos are very appealing since they could naturally explain neutrino physics and also provide a good dark matter (DM) candidate such as the lightest supersymmetric particle (LSP). In this work we consider the next-to-minimal supersymmetric standard model (NMSSM) plus RH neutrino superfields, with effective Majorana masses dynamically generated at the electroweak scale (EW). We perform a scan of the relevant parameter space and study both possible DM candidates: RH sneutrino and neutralino. Especially for the case of RH sneutrino DM we analyse the intimate relation between both candidates to obtain the correct amount of relic density. Besides the well-known resonances, annihilations through scalar quartic couplings and coannihilation mechanisms with all kind of neutralinos, are crucial. Finally, we present the impact of current and future direct and indirect detection experiments on both DM candidates.

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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