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arXiv 2104.01045hep-ph
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Type-II Seesaw 中具有 $Z_3$ 对称性的标量暗物质

Scalar dark matter with $Z_3$ symmetry in Type-II Seesaw

XinXin Qi, Hao Sun

AI总结:

在 Type-II seesaw 框架下研究具有 $Z_3$ 对称性的复标量单重态暗物质模型,通过增强半湮灭效应解释 AMS-02 等观测的正负电子通量超出,并结合反质子能谱限制得出 3 TeV 暗物质质量下半湮灭截面占比小于 $3\%$。

摘要:

我们在 Type-II seesaw 机制框架下研究了一个具有 $Z_3$ 对称性的简单复标量单重态暗物质(DM)模型。我们使用该模型解释 AMS-02、DAMPE 和 Fermi-LAT 合作组测量到的正负电子通量超出,该超出是由银河系晕中暗物质湮灭产生的三重态衰变所引发的。我们重点关注非简并情况,即暗物质质量大于三重态质量,并刻意减弱暗物质的亲轻子性质,从而增强半湮灭效应。在 $Z_3$ 对称性的保证下,通过拟合 PAMELA 和 AMS 实验观测到的反质子能谱,我们发现暗物质的三次项以及暗物质与 Higgs 之间的耦合受到强烈限制,导致当暗物质质量设定为 3 TeV 时,半湮灭截面占比小于 $3\%$。

英文摘要:

We study a simple complex scalar singlet dark matter (DM) model with $Z_3$ symmetry in the framework of type-II seesaw mechanism. We use the model to explain the excess of electron-positron flux measured by AMS-02, DAMPE and Fermi-LAT collaborations, which is encouraged by the decay of the triplets produced from dark matter annihilations in the Galactic halo. We focus on the non-degenerate case in which the mass of DM is larger than that of the triplets' and deliberately alleviate the leptophilic properties of the DM, so that the semi-annihilation effects are enhanced. With the guarantee of $Z_3$ symmetry, by fitting the antiproton spectrum observed in PAMELA and AMS experiments, we find that the DM cubic terms and the couplings between DM and Higgs are strongly constrained, leading to the semi-annihilation cross section fraction less than $3\%$ when DM mass is given at 3 TeV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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