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arXiv 1502.05703hep-phastro-ph.COastro-ph.HEhep-ex
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最小超对称标准模型中银心过剩的描述

A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model

Abraham Achterberg, Simone Amoroso, Sascha Caron, Luc Hendriks, Roberto Ruiz de Austri, Christoph Weniger

摘要:

费米大面积望远镜(LAT)的观测表明,来自银河系中心的伽马射线过量。对这种过剩的一种可能的解释是暗物质粒子的湮灭。我们在唯象最小超对称标准模型(pMSSM)中研究了作为暗物质候选者的中性伴子的湮灭。迭代粒子滤波方法被用来搜索pMSSM内的解决方案。我们发现的解决方案是一致的天体粒子物理和对撞机实验,并提供了一个适合的能量谱的过剩。中性伴子是质量在$84-92$ ~GeV或$87-97$ ~GeV范围内的Bino/Higgsino或Bino/Wino/Higgsino混合物,湮灭为W玻色子。第三种解是质量为$174-187$ ~GeV的中性伴子湮灭为顶夸克的解。最佳解产生暗物质遗迹密度$0.06 < Ωh^2 <0.13$。这些pMSSM解决方案为LHC、直接和间接DM检测实验做出了明确的预测。如果MSSM对费米-LAT观测到的过量现象的解释是正确的,那么DM信号可能很快就会被发现。

英文摘要:

Observations with the Fermi Large Area Telescope (LAT) indicate an excess in gamma rays originating from the center of our Galaxy. A possible explanation for this excess is the annihilation of Dark Matter particles. We have investigated the annihilation of neutralinos as Dark Matter candidates within the phenomenological Minimal Supersymmetric Standard Model (pMSSM). An iterative particle filter approach was used to search for solutions within the pMSSM. We found solutions that are consistent with astroparticle physics and collider experiments, and provide a fit to the energy spectrum of the excess. The neutralino is a Bino/Higgsino or Bino/Wino/Higgsino mixture with a mass in the range $84-92$~GeV or $87-97$~GeV annihilating into W bosons. A third solutions is found for a neutralino of mass $174-187$~GeV annihilating into top quarks. The best solutions yield a Dark Matter relic density $0.06 < Ωh^2 <0.13$. These pMSSM solutions make clear forecasts for LHC, direct and indirect DM detection experiments. If the MSSM explanation of the excess seen by Fermi-LAT is correct, a DM signal might be discovered soon.

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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