银河系中心与矮椭球星系的伽马射线观测对级联湮灭模型的约束
高能物理 - 唯象学
2015-10-21 v2 高能天体物理现象
摘要
许多粒子暗物质模型预测暗物质会发生级联湮灭，即湮灭产物为四体末态。在模型无关的级联湮灭模型框架下，我们研究了费米大面积望远镜（Fermi-LAT）观测到的银河系中心伽马射线辐射的暗物质解释与矮椭球星系零探测结果的兼容性。对于银河系密度轮廓和本地暗物质密度的标准值，我们发现对银河系中心辐射的暗物质解释受到了强烈约束。然而，暗物质分布的不确定性削弱了这些约束，并在较宽的质量尺度范围内为暗物质解释留下了空间。
引用
@article{arxiv.1508.05989,
title = {Confronting Galactic center and dwarf spheroidal gamma-ray observations with cascade annihilation models},
author = {Bhaskar Dutta and Yu Gao and Tathagata Ghosh and Louis E. Strigari},
journal= {arXiv preprint arXiv:1508.05989},
year = {2015}
}
备注
11 pages, 8 figures, 2 tables. References added, typos corrected (Our $U(1)_{B-L}$ model section has been borrowed from arXiv:0902.3463 [hep-ph], were B.D is a co-author along with the author of arXiv: arXiv:0909.5643. Hence arXiv:0909.5643 has also borrowed from arXiv:0902.3463 [hep-ph], resulting in overlap of text.)