Unified scenario for composite right-handed neutrinos and dark matter
Unified scenario for composite right-handed neutrinos and dark matter
复制标题
复合右手中微子和暗物质的统一场景
DOI：
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发表时间：
2017
期刊：
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通讯作者：
E. Rinaldi
中科院分区：
文献类型：
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作者：
H. Davoudiasl;P. Giardino;E. Neil;E. Rinaldi
我们考虑的可能性，中微子质量和暗物质（DM）起源于一个共同的复合暗扇区。基于暗SU（3）D与三种无质量暗夸克的相互作用，可以建立一个最小有效理论，电弱对称破缺给暗夸克以质量。通过将$\mathbb Z_2$电荷分配给一种味道，稳定的“暗K介子”可以提供良好的热遗迹DM候选者。我们发现，“暗中子”可能是右手狄拉克中微子。在暗区的某种程度的“中子-反中子”振荡会导致轻标准模型中微子的马约拉纳质量不为零。本文提出了一个简单的紫外完备化方法，它涉及到附加的SU（3）D带电重粒子和电弱轻子Yukawa耦合.在我们的基准点上，有比希格斯粒子轻得多的“暗π介子”，我们预计紫外线框架会产生壮观的对撞机信号。这包括希格斯玻色子衰变为$\tau \tau \ell \ell^{\prime}$，其中$\ell$（$\ell '$）可以是任何顶点位移的轻子。我们讨论了在暗物质搜索和原始引力波实验中这个UV框架的观测特征;后者的特征可能与H \to \tau \tau \ell \ell^{\prime}$衰变相关。
We entertain the possibility that neutrino masses and dark matter (DM) originate from a common composite dark sector. A minimal effective theory can be constructed based on a dark $SU(3)_D$ interaction with three flavors of massless dark quarks; electroweak symmetry breaking gives masses to the dark quarks. By assigning a $\mathbb Z_2$ charge to one flavor, a stable "dark kaon" can provide a good thermal relic DM candidate. We find that "dark neutrons" may be identified as right handed Dirac neutrinos. Some level of "neutron-anti-neutron" oscillation in the dark sector can then result in non-zero Majorana masses for light Standard Model neutrinos. A simple ultraviolet completion is presented, involving additional heavy $SU(3)_D$-charged particles with electroweak and lepton Yukawa couplings. At our benchmark point, there are "dark pions" that are much lighter than the Higgs and we expect spectacular collider signals arising from the UV framework. This includes the decay of the Higgs boson to $\tau \tau \ell \ell^{\prime}$, where $\ell$($\ell'$) can be any lepton, with displaced vertices. We discuss the observational signatures of this UV framework in dark matter searches and primordial gravitational wave experiments; the latter signature is potentially correlated with the $H \to \tau \tau \ell \ell^{\prime}$ decay.