标题： 费米-LAT 对银河晕弥散暗物质湮灭的限制 显示英文标题

标题： Fermi-LAT constraints on diffuse Dark Matter annihilation from the Galactic Halo

摘要： 我们的星系位于一个巨大的暗物质（DM）“晕”中心。在许多可行的粒子物理模型中，这种浓度会产生一种间接的弱相互作用大质量粒子（WIMP）湮灭信号，在费米伽马射线太空望远镜（Fermi-LAT）的能量范围内达到峰值。我们对弥散背景的知识对于合理限制暗物质的质量和截面至关重要。我们将基于当前宇宙射线测量约束的GALPROP银河弥漫背景模型的系统变化纳入轮廓似然分析，并利用费米伽马射线太空望远镜（Fermi-LAT）的数据给出了暗物质湮灭截面的初步上限。 显示英文摘要

摘要： Our Galaxy resides in the center of a vast "Halo" of Dark Matter (DM). This concentration produces, in many viable particle physics models, an indirect Weakly Interacting Massive Particle (WIMP) annihilation signal that peaks in the Fermi-LAT's energy range. Our knowledge of the diffuse background is essential to placing reasonable limits on the DM mass and cross-section. We incorporate a systematic variation of the GALPROP galactic diffuse background model, constrained by current cosmic-ray measurements, into a profile likelihood analysis and present preliminary upper limits on the DM annihilation cross-section using the Fermi-LAT data.