Direct detections of Majorana dark matter in vector portal

Direct detections of Majorana dark matter in vector portal
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在矢量门户中直接检测马约拉纳暗物质

DOI:
10.1007/jhep11(2019)013
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发表时间:
2019-04
影响因子:
5.4
通讯作者:
Chao Wei
Chao Wei
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chao Wei

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本文研究了在矢量门中对马约拉纳暗物质的直接探测。考虑到这些模型中的树能级散射截面要么是速度抑制的,要么是自旋相关的,我们用有效场论方法计算了对自旋无关散射截面的辐射修正。在单圈水平上计算了MDM-夸克有效相互作用的Wilson系数,在双圈水平上导出了MDM-胶子有效相互作用的Wilson系数.数值结果表明,当考虑树能级贡献时,电流约束可以排除MDM的窄质量范围,辐射修正的自旋无关截面比树能级贡献小几个数量级.
In this paper we investigate the direct detections of Majorana dark matter (MDM) in vector portal. Considering that the tree-level scattering cross sections in these models are either dark matter velocity suppressed or spin-dependent, we calculate radiative corrections to the spin-independent cross section in effective field theory approach. Wilson coefficients of effective MDM-quark interactions are calculated at the one-loop level, and the Wilson coefficient of the effective MDM-gluon interaction is derived at the two-loop level. Numerical results show that current constraints can rule out a narrow mass range of MDM when tree-level contributions are considered, and the spin-independent cross section from radiative corrections is a few orders of magnitude smaller than the tree-level contributions.
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