Dark matter scattering cross section and dynamics in dark Yang-Mills theory
Dark matter scattering cross section and dynamics in dark Yang-Mills theory
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DOI：
10.1016/j.physletb.2020.136056
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发表时间：
2021-02
影响因子：
4.4
通讯作者：
N. Yamanaka;H. Iida;A. Nakamura;M. Wakayama
中科院分区：
文献类型：
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作者：
N. Yamanaka;H. Iida;A. Nakamura;M. Wakayama
我们首次在 S U (2) 纯杨-米尔斯理论中计算了最轻胶球之间的散射截面，它们是暗物质的良好候选者。第一步，我们使用 HAL QCD 方法评估晶格上的胶球间势，具有多个晶格间距（β= 2.1、2.2、2.3、2.4 和 2.5）。通过减去离心力来消除与非零角动量效应相关的系统学。通过采用簇分解误差减少技术和使用所有时空对称性，可以提高统计精度。然后，我们确定低能胶球有效拉格朗日量和低能散射截面，并将其与暗物质自散射的观测约束进行比较。我们推导出 S U (2) Yang-Mills 理论尺度参数的下界，即 Λ> 60 MeV。
We calculate for the first time the scattering cross section between lightest glueballs in S U (2) pure Yang-Mills theory, which are good candidates of dark matter. In the first step, we evaluate the interglueball potential on lattice using the HAL QCD method, with several lattice spacings (β= 2.1, 2.2, 2.3, 2.4, and 2.5). The systematics associated with nonzero angular momentum effect is removed by subtracting the centrifugal force. The statistical accuracy is improved by employing the cluster-decomposition error reduction technique and by using all space-time symmetries. We then determine the low energy glueball effective Lagrangian and the scattering cross section at low energy, which is compared with the observational constraint on the dark matter self-scattering. We derive the lower bound on the scale parameter of the S U (2) Yang-Mills theory, as Λ> 60 MeV.