Heavy wino-like neutralino dark matter annihilation into antiparticles
Heavy wino-like neutralino dark matter annihilation into antiparticles
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DOI：
10.1103/physrevd.73.055004
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发表时间：
2005-11
影响因子：
5
通讯作者：
J. Hisano;S. Matsumoto;Osamu Saito;Masato Senami
中科院分区：
文献类型：
--
作者：
J. Hisano;S. Matsumoto;Osamu Saito;Masato Senami
最轻的中性伴子是一种可行的暗物质（DM）候选者。本文研究了利用星系晕湮灭产生的正电子和反质子间接探测类维诺中性伴子DM。当质量为2 TeV左右时，这是从热遗迹丰度的青睐，非微扰效应显着增强湮没截面成正电子和反质子。我们发现，能量大于100 GeV的正电子和反质子通量可能会变得比预期的背景更大。由于正电子通量对天体物理参数的敏感性较低，因此在即将进行的PAMELA和AMS-02等实验中可能有希望进行探测。我们还发现质量约为2 TeV的类维诺中性伴子DM与HEAT反常是相容的。
The lightest neutralino is a viable dark matter (DM) candidate. In this paper we study indirect detection of the wino-like neutralino DM using positrons and antiprotons from the annihilation in the galactic halo. When the mass is around 2 TeV, which is favored from the thermal relic abundance, the nonperturbation effect significantly enhances the annihilation cross sections into positrons and antiprotons. We find that the positron and antiproton fluxes with energies larger than 100 GeV may become larger than the expected backgrounds. Since the positron flux is less sensitive to the astrophysical parameters, the detection may be promising in the upcoming experiments such as PAMELA and AMS-02. We also find the wino-like neutralino DM with mass around 2 TeV is compatible with the HEAT anomaly.