Effective interaction of electroweak-interacting dark matter with Higgs boson and its phenomenology
Effective interaction of electroweak-interacting dark matter with Higgs boson and its phenomenology
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DOI：
10.1016/j.physletb.2015.01.012
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发表时间：
2014-10
影响因子：
4.4
通讯作者：
J. Hisano;Daiki Kobayashi;Naoya Mori;E. Senaha
中科院分区：
文献类型：
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作者：
J. Hisano;Daiki Kobayashi;Naoya Mori;E. Senaha
我们研究质量为 O (100) GeV 的电弱相互作用费米子暗物质 (DM) 的现象学。构建描述希格斯玻色子和 SU (2) L 同位旋多重态费米子之间相互作用的有效拉格朗日量，我们评估了电子的电偶极矩 (EDM)、希格斯玻色子衰变为两个光子的信号强度以及与质子的自旋无关弹性散射截面。作为代表性案例，我们考虑具有零/非零超电荷的 SU (2) L 三重态费米子和 SU (2) L 双态费米子。研究发现电子电火花加工对这些模型参数空间给出了严格的约束。在零超荷的三重态费米子和双态费米子的情况下，一旦考虑到当前的 DM 直接检测约束，希格斯信号强度与标准模型预测的偏差不会超过百分之几，即使 CP 破坏被抑制。相反，对于具有非零超电荷的三重态费米子，可能会出现 O (10–20)% 的偏差。我们的代表性场景可能会通过未来的实验进行测试。
We study phenomenology of electroweak-interacting fermionic dark matter (DM) with a mass of O (100) GeV. Constructing the effective Lagrangian that describes the interactions between the Higgs boson and the SU (2) L isospin multiplet fermion, we evaluate the electric dipole moment (EDM) of electron, the signal strength of Higgs boson decay to two photons and the spin-independent elastic-scattering cross section with proton. As representative cases, we consider the SU (2) L triplet fermions with zero/nonzero hypercharges and SU (2) L doublet fermion. It is found that the electron EDM gives stringent constraints on those model parameter spaces. In the cases of the triplet fermion with zero hypercharge and the doublet fermion, the Higgs signal strength does not deviate from the standard model prediction by more than a few% once the current DM direct detection constraint is taken into account, even if the CP violation is suppressed. On the contrary, O (10–20)% deviation may occur in the case of the triplet fermion with nonzero hypercharge. Our representative scenarios may be tested by the future experiments.