Pre-launch estimates for GLAST sensitivity to dark matter annihilation signals
Pre-launch estimates for GLAST sensitivity to dark matter annihilation signals
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DOI：
10.1088/1475-7516/2008/07/013
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发表时间：
2008-06
影响因子：
6.4
通讯作者：
E. Baltz;B. Berenji;Menlo Park Kipac;G. Bertone;I. Paris;L. Bergström;U. Stockholm;E. Bloom;T. Bringmann;J. Chiang;J. Cohen-Tanugi;J. Conrad;Y. Edmonds;J. Edsjö;G. Godfrey;R. Hughes;Robert P. Johnson;S. Uc;A. Lionetto;R. Infn;A. Moiseev;A. Morselli;I. Moskalenko;E. Nuss;U. Montpellier;J. Ormes;U. Denver;R. Rando;Padua Infn;M. P. I. Garching
中科院分区：
文献类型：
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作者：
E. Baltz;B. Berenji;Menlo Park Kipac;G. Bertone;I. Paris;L. Bergström;U. Stockholm;E. Bloom;T. Bringmann;J. Chiang;J. Cohen-Tanugi;J. Conrad;Y. Edmonds;J. Edsjö;G. Godfrey;R. Hughes;Robert P. Johnson;S. Uc;A. Lionetto;R. Infn;A. Moiseev;A. Morselli;I. Moskalenko;E. Nuss;U. Montpellier;J. Ormes;U. Denver;R. Rando;Padua Infn;M. P. I. Garching
我们研究了伽马射线大面积空间望远镜（GLAST）通过弱相互作用大质量粒子（WIMPs）对湮灭产生的伽马射线信号间接探测它们的灵敏度。WIMPs是解释宇宙中约80%的质量为非重子暗物质（DM）这一令人信服的证据的热门候选者之一。它们是由粒子物理学标准模型的各种扩展（如超对称和普遍额外维度（UED））偶然引发的。凭借其前所未有的灵敏度和非常大的能量范围（20兆电子伏到超过300吉电子伏），GLAST卫星上的主要仪器——大面积望远镜（LAT）将开启一个新的发现窗口。正如我们的估计所示，如果暗物质分布具有尖峰轮廓，LAT将能够为一大类WIMP模型探测到间接的暗物质特征。利用LAT合作团队开发的当前最先进的蒙特卡罗和事件重建软件，我们对银河系内外的几个可能的源进行了初步的灵敏度研究。我们还讨论了LAT通过电子/正电子通道探测UED的潜力。文中还介绍了在设定限制或探测信号方面非常重要的弥散背景建模和其他背景问题。
We investigate the sensitivity of the Gamma-ray Large Area Space Telescope (GLAST) for indirectly detecting weakly interacting massive particles (WIMPs) through the γ-ray signal that their pair annihilation produces. WIMPs are among the favorite candidates for explaining the compelling evidence that about 80% of the mass in the Universe is non-baryonic dark matter (DM). They are serendipitously motivated by various extensions of the standard model of particle physics such as supersymmetry and universal extra dimensions (UED). With its unprecedented sensitivity and its very large energy range (20 MeV to more than 300 GeV) the main instrument on board the GLAST satellite, the Large Area Telescope (LAT), will open a new window of discovery. As our estimates show, the LAT will be able to detect an indirect DM signature for a large class of WIMP models given a cuspy profile for the DM distribution. Using the current state of the art Monte Carlo and event reconstruction software developed within the LAT collaboration, we present preliminary sensitivity studies for several possible sources inside and outside the Galaxy. We also discuss the potential of the LAT to detect UED via the electron/positron channel. Diffuse background modeling and other background issues that will be important in setting limits or seeing a signal are presented.