论文标题
低尺度旁路的有效野外理论
The effective field theory of low scale see-saw at colliders
论文作者
论文摘要
我们研究了涉及右撇子中微子的操作员扩展的标准模型有效场理论（$ν$ smeft），重点关注右手中微子衰减的制度，迅速在对撞机的尺度上到光子和标准模型中微子。对于右撇子中微子，这种情况自然而然地出现，质量为$ m_n \ sim 0.1 \ dots 10 \，\ text {gev} $。我们使用LEP和LHC搜索限制了相关的六个操作员系数，并在最终状态下以及锥形和tau衰减限制了降低的尺寸和LHC搜索。尽管新物理贡献的界限通常在TEV量表中以订购一个操作员系数，但是某些系数仍然受到非常差的约束，甚至完全避免了当前数据的范围。因此，我们确定了这种弱限制的场景，并提出了涉及光子的稀有顶部和tau衰减的新搜索，以探测$ν$ smeft参数空间中潜在的新物理。我们的分析强调了对新的稀有tau和顶级腐烂进行专门搜索的重要性。
We study the Standard Model effective field theory ($ν$SMEFT) extended with operators involving right-handed neutrinos, focussing on the regime where the right-handed neutrinos decay promptly on collider scales to a photon and a Standard Model neutrino. This scenario arises naturally for right-handed neutrinos with masses of the order $m_N \sim 0.1 \dots 10\, \text{GeV}$. We limit the relevant dimension-six operator coefficients using LEP and LHC searches with photons and missing energy in the final state as well as pion and tau decays. While bounds on new physics contributions are generally in the TeV scale for order one operator coefficients, some coefficients, however, remain very poorly constrained or even entirely evade bounds from current data. Consequently, we identify such weakly constrained scenarios and propose new searches for rare top and tau decays involving photons to probe potential new physics in the $ν$SMEFT parameter space. Our analysis highlights the importance of performing dedicated searches for new rare tau and top decays.
