本文回顾了轻媒介交换导致顶夸克正反向前向背向不对称性的可能性，模型未受原子电弱相互作用的严格限制。模型与中微子活跃性及Type-I seesaw机制的联系避免了严格的单喷射限制，拓宽了LHC的物理现象。全球数据拟合揭示了符合实验约束的参数区域，并讨论了预期的单顶信号及其相关的勒pton电荷不对称性在LHC中的发现潜力。
摘要：
We revisit the possibility that the top quark forward-backward asymmetryarises from the on-shell production and decay of scalar top partners totop-antitop pairs with missing transverse energy. Although the asymmetry isproduced by t-channel exchange of a light mediator, the model remainsunconstrained by low energy atomic parity violation tests. An interestingconnection to the active neutrino sector through a Type-I seesaw operator helpsto evade stringent monojet constraints and opens up a richer colliderphenomenology. After performing a global fit to top data from both the Tevatronand the LHC, we obtain a viable region of parameter space consistent with allphenomenological and collider constraints. We also discuss the discoverypotential of a predicted monotop signal and related lepton charge asymmetry atthe LHC.
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