论文标题
辐射seeSAW模型的框架中的多电荷TEV量表标量和费米子
Multi-charged TeV scale scalars and fermions in the framework of a radiative seesaw model
论文作者
论文摘要
解释微小的中微子质量和非零混合物一直是超越标准模型（SM）框架的关键动机之一。我们讨论了一个可对撞机测试模型，用于通过辐射Seesaw机制产生中微子肿块和混合。该模型不需要任何额外的对称性来禁止树级的seesaws使其对撞机的现象学有趣。该模型包括在TEV量表上的多电荷费米/标量，以在1循环级别实现Weinberg操作员。在对中微子振荡数据以及绝对中微子质量尺度上的上微子振荡数据以及上边界产生的模型参数的约束之后，我们讨论了这些TEV量表量表/标量量表的产生，衰减和结果对撞机的签名，该量表量表/标量量表（LHC）（LHC）。我们认为drell-yan和光生产。中微子数据的边界表明该模型中可能存在长寿命的多芯粒子（MCP）。我们从Atlas搜索异常较大的电离签名中获得了这些长寿命的MCP质量的界限。当Tev量表费米子/标量发生迅速衰减时，我们将重点放在4-Lepton的最终状态上，并从不同的Atlas 4-Lepton搜索中获得界限。我们还提出了一个4-Lepton事件选择标准，旨在在此模型的背景下增强信号与背景比率。
Explaining the tiny neutrino masses and non-zero mixings have been one of the key motivations for going beyond the framework of the Standard Model (SM). We discuss a collider testable model for generating neutrino masses and mixings via radiative seesaw mechanism. That the model does not require any additional symmetry to forbid tree-level seesaws makes its collider phenomenology interesting. The model includes multi-charged fermions/scalars at the TeV scale to realize the Weinberg operator at 1-loop level. After deriving the constraints on the model parameters resulting from the neutrino oscillation data as well as from the upper bound on the absolute neutrino mass scale, we discuss the production, decay and resulting collider signatures of these TeV scale fermions/scalars at the Large Hadron Collider (LHC). We consider both Drell-Yan and photoproduction. The bounds from the neutrino data indicate the possible presence of a long-lived multi-charged particle (MCP) in this model. We obtain bounds on these long-lived MCP masses from the ATLAS search for abnormally large ionization signature. When the TeV scale fermions/scalars undergo prompt decay, we focus on the 4-lepton final states and obtain bounds from different ATLAS 4-lepton searches. We also propose a 4-lepton event selection criteria designed to enhance the signal to background ratio in the context of this model.
