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arXiv 1407.0174hep-ph
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简化的暗物质模型面对Gamma Ray过剩

Simplified Dark Matter Models Confront the Gamma Ray Excess

Csaba Balázs, Tong Li

摘要:

受银河系中心过量伽马射线的启发,我们面对一些简化的暗物质模型与实验数据。假设一个单一的暗物质粒子耦合到标准物质通过自旋0调解人,我们比较模型的证据马约拉纳费米子,真正的标量和真正的矢量暗物质候选人。我们考虑暗物质湮灭到各种费米子最终状态有助于观察到的差分伽马射线通量。我们的似然函数还包括暗物质遗迹密度,它的弹性散射截面与核,和对撞机的限制。使用贝叶斯推断,我们限制的质量和耦合强度的暗物质和介质粒子。我们的结果表明,如果伽马射线过剩是由于暗物质的上述参数很好地约束的观测。我们发现,马约拉纳费米子暗物质模型是支持的数据。

英文摘要:

Inspired by the excess of gamma rays from the Galactic Center, we confront a number of simplified dark matter models with experimental data. Assuming a single dark matter particle coupled to standard matter via a spin-0 mediator, we compare model evidences for Majorana fermion, real scalar and real vector dark matter candidates. We consider dark matter annihilation into various fermionic final states contributing to the observed differential gamma ray flux. Our likelihood function also includes the dark matter relic density, its elastic scattering cross section with nuclei, and collider limits. Using Bayesian inference we confine the mass and couplings strengths of the dark matter and mediator particle. Our results show that, if the gamma ray excess is due to dark matter the above parameters are well constrained by the observations. We find that the Majorana fermion dark matter model is supported the most by the data.

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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