The contribution to the antimatter flux from individual dark matter substructures
The contribution to the antimatter flux from individual dark matter substructures
复制标题
单个暗物质子结构对反物质通量的贡献
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
P. Ullio
中科院分区：
文献类型：
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作者：
M. Regis;P. Ullio
由单个暗物质（DM）子结构引起的局部反物质通量可以显著依赖于源的自行。我们推导出与时间相关的正电子和反质子的主要来源的传播方程的解析解，发现静态限制是一个公平的近似只有非常高的能量粒子和附近的来源。本文讨论了弱相互作用大质量粒子（WIMP）模型对PAMELA正电子过剩和FERMI全电子数据的拟合。我们发现，对于一个单一的非静态DM点源，不能提取的数据，在一个独特的方式，模型独立的粒子物理观测，如WIMP质量，对湮灭截面，和湮灭产率。与WIMP模型相关的伽马射线发射诱导了显着的局部正电子或反质子通量，被发现与EGRET测量兼容，但它可以肯定地被FERMI-LAT望远镜挑出来。
The local antimatter fluxes induced by an individual dark matter (DM) substructure can be significantly dependent on the proper motion of the source. We derive analytic solutions to the propagation equation for time-dependent positron and antiproton primary sources, finding that the static limit is a fair approximation only for very high energy particles and nearby sources. We discuss weakly interacting massive particle (WIMP) models fitting the PAMELA positron excess and the FERMI all-electron data. We show that, for a single non-static DM point-source, one cannot extract from the data, in a unique way, model independent particle physics observables, such as the WIMP mass, the pair annihilation cross section, and the annihilation yield. The gamma-ray emission associated to WIMP models inducing a significant local flux of positrons or antiprotons is found to be compatible with EGRET measurements, but it can be definitely singled out with the FERMI-LAT telescope.