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arXiv 2107.04375hep-phastro-ph.COhep-th
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重组强相互作用大质量粒子暗物质

Reshuffled Strongly Interacting Massive Particle Dark Matter

Shu-Yu Ho, Pyungwon Ko, Chih-Ting Lu

摘要:

在这项工作中,我们重新分析的多组分强相互作用大质量粒子(mSIMP)的情况下,使用有效的运营商的方法。在单组分SIMP的情况下,mSIMP暗物质(DM)的总遗迹丰度由一个五点有效算子实现的$3 \to 2$过程的耦合强度决定。有趣的是,我们注意到在暗区存在一个由相应的五点相互作用引起的不可约的$2 \to 2$过程,该过程将在化学冻结后重新排列SIMP DM的质量密度。我们将这种DM场景称为重组的SIMP($r$ SIMP)。考虑到这一点,我们数值求解了包含$3 \to 2$和$2 \to 2$过程的耦合Boltzmann方程,得到了正确的$r$ SIMP DM产率.结果表明,$r$ SIMP DM的质量必须接近简并,才能贡献相当大的丰度。另一方面,我们还引入有效的运营商,通过矢量门户耦合的黑暗部门和可见部门的桥梁。值得注意的是,我们发现,在$r$ SIMP方案的洗牌机制是敏感的DM自相互作用的截面的大小。

英文摘要:

In this work, we reanalyze the multi-component strongly interacting massive particle (mSIMP) scenario using an effective operator approach. As in the single-component SIMP case, the total relic abundance of mSIMP dark matter (DM) is determined by the coupling strengths of $3 \to 2$ processes achieved by a five-point effective operator. Intriguingly, we notice that there is an irreducible $2 \to 2$ process induced by the corresponding five-point interaction in the dark sector, which would reshuffle the mass densities of SIMP DM after the chemical freeze-out. We dub this DM scenario as reshuffled SIMP ($r$SIMP). Given this observation, we then numerically solve the coupled Boltzmann equations including the $3 \to 2$ and $2 \to 2$ processes to get the correct yields of $r$SIMP DM. It turns out that the masses of $r$SIMP DM must be nearly degenerate for them to contribute sizable abundances. On the other hand, we also introduce effective operators to bridge the dark sector and visible sector via a vector portal coupling. Notably, we find that the reshuffled mechanism in the $r$SIMP scenario is sensitive to the size of the DM self-interacting cross section.

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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