Probing heavy dark matter decays with multi-messenger astrophysical data
Probing heavy dark matter decays with multi-messenger astrophysical data
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DOI：
10.1088/1475-7516/2020/01/003
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发表时间：
2019-07
影响因子：
6.4
通讯作者：
Koji Ishiwata;O. Macias;S. Ando;M. Arimoto
中科院分区：
文献类型：
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作者：
Koji Ishiwata;O. Macias;S. Ando;M. Arimoto
我们对质量跨越很大范围(104GeV，1016GeV)的衰变暗物质粒子设置了保守的约束。为此，我们使用了宇宙射线(CR)质子/反质子、电子/正电子、中微子/反中微子和伽马射线的多源观测。我们用Dokshitzer-Gribov-Lipatov-Altarelli-Parisi方程和PYTHIA程序包模拟了进入b̄b通道的暗物质产额谱。然后，我们利用目前最先进的数值框架CRPropa、GALPROP和HelMod分别在河外、银河区和日光层中求解CR输运方程，将暗物质起源的CRS传播到地球。保守极限是通过要求地球上预测的暗物质光谱小于观测到的CR光谱来获得的。总体而言，我们排除了S或更短的暗物质寿命，所有在这项工作中调查的质量。对于质量在1011-1014GeV范围内的超重暗物质粒子，最严格的约束达到了1030 S。
We set conservative constraints on decaying dark matter particles with masses spanning a very wide range (104−1016 GeV). For this we use multimessenger observations of cosmic-ray (CR) protons/antiprotons, electrons/positrons, neutrinos/antineutrinos and gamma rays. Focusing on decays into the b̄b channel, we simulate the spectra of dark matter yields by using the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi equations and the Pythia package. We then propagate the CRs of dark matter origin till Earth by using the state-of-the-art numerical frameworks CRPropa, GALPROP and HelMod for the solution of the CR transport equation in the extragalactic, Galactic region and the heliosphere, respectively. Conservative limits are obtained by requiring that the predicted dark matter spectra at Earth be less than the observed CR spectra. Overall, we exclude dark matter lifetimes of 1028 s or shorter for all the masses investigated in this work. The most stringent constraints reach 1030 s for very heavy dark matter particles with masses in the range 1011–1014 GeV.