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arXiv 1301.4368hep-ph
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费米-LAT gamma-ray线磁矩的多分量暗物质

Multi-component dark matter with magnetic moments for Fermi-LAT gamma-ray line

Pei-Hong Gu

摘要:

我们提出了一个多组分暗物质与磁矩的模型来解释130 GeV的伽玛射线线暗示的费米LAT数据。具体地说,我们考虑了一个U(1)_X暗扇区,其中除了相关的规范场和Higgs场之外,还包含两个矢量类费米子。在SU(3)_c \times SU(2)_L \times SU(2)_R \times U(1)_{B-L}左右对称的普适跷跷板模型中,进一步引入一个超重信使标量,构造了暗费米子与重[SU(2)]单重轻子的Yukawa耦合.一个较重且寿命很长的暗费米子,在单圈能级上,大多数情况下可以衰变为较轻的暗费米子和光子。暗费米子可以充当暗物质粒子,它们从湮灭到暗规范场和希格斯场中受益。在U(1)动力学混合存在的情况下,暗物质费米子可以通过正在进行和即将进行的暗物质直接探测实验来验证。

英文摘要:

We propose a model of multi-component dark matter with magnetic moments to explain the 130 GeV gamma-ray line hinted by the Fermi-LAT data. Specifically, we consider a U(1)_X dark sector which contains two vector-like fermions besides the related gauge and Higgs fields. A very heavy messenger scalar is further introduced to construct the Yukawa couplings of the dark fermions to the heavy [SU(2)]-singlet leptons in the SU(3)_c \times SU(2)_L \times SU(2)_R \times U(1)_{B-L} left-right symmetric models for universal seesaw. A heavier dark fermion with a very long lifetime can mostly decay into a lighter dark fermion and a photon at one-loop level. The dark fermions can serve as the dark matter particles benefited from their annihilations into the dark gauge and Higgs fields. In the presence of a U(1) kinetic mixing, the dark matter fermions can be verified by the ongoing and forthcoming dark matter direct detection experiments.

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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