arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1104.5329hep-phastro-ph.CO
收藏

暗物质有效相互作用的Gamma-ray约束

Gamma-ray Constraints on Effective Interactions of the Dark Matter

Kingman Cheung, Po-Yan Tseng, Tzu-Chiang Yuan

摘要:

使用一个有效的相互作用的方法来描述之间的相互作用的暗物质粒子和光的自由度的标准模型,我们计算的伽马射线通量由于湮灭的暗物质成夸克,然后分裂成中性π介子,随后衰变成光子。通过与Fermi-LAT实验的中纬度数据比较,我们得到了有效相互作用大小的有效约束条件,这些约束条件与对撞机、γ射线谱线和反物质搜索实验的结果相当。然而,由费米子暗物质和轻夸克之间的标量和矢量交换引起的两个算符对自旋无关的截面有更严格的限制。

英文摘要:

Using an effective interaction approach to describe the interactions between the dark matter particle and the light degrees of freedom of the standard model, we calculate the gamma-ray flux due to the annihilation of the dark matter into quarks, followed by fragmentation into neutral pions which subsequently decay into photons. By comparison to the mid-latitude data released from the Fermi-LAT experiment, we obtain useful constraints on the size of the effective interactions and they are found to be comparable to those deduced from collider, gamma-ray line and anti-matter search experiments. However, the two operators induced by scalar and vector exchange among fermionic dark matter and light quarks that contribute to spin-independent cross sections are constrained more stringently by the recent XENON100 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。

↑