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Spin-one top partner: phenomenology

机译:旋转式最佳搭档:现象学

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摘要

Cai, Cheng, and Terning (CCT) suggested a model in which the left-handed top quark is identified with a gaugino of an extended gauge group, and its superpartner is a spin-1 particle. We perform a phenomenological analysis of this model, with a focus on the spin-1 top partner, which we dub the “swan”. We find that precision electroweak fits, together with direct searches for Z ′ bosons at the LHC, place a lower bound of at least about 4.5 TeV on the swan mass. An even stronger bound, 10 TeV or above, applies in most of the parameter space, mainly due to the fact that the swan is typically predicted to be significantly heavier than the Z ′. We find that the 125 GeV Higgs can be easily accommodated in this model with non-decoupling D-terms. In spite of the strong lower bound on the swan mass, we find that corrections to Higgs couplings to photons and gluons induced by swan loops are potentially observable at future Higgs factories. We also briefly discuss the prospects for discovering a swan at the proposed 100 TeV pp collider
机译:Cai,Cheng和Terning(CCT)提出了一个模型,其中左撇子上夸克被确定为一个扩展规组的高牛,而其超级伙伴是spin-1粒子。我们对该模型进行了现象学分析,重点是旋转1的最佳伴侣,我们将其称为“天鹅”。我们发现,精确的电弱拟合以及在大型强子对撞机中直接搜索Z'玻色子的结果,对天鹅质量的下界至少为4.5 TeV。 10 TeV或更高的范围甚至更强,适用于大多数参数空间,这主要是由于通常预测天鹅比Z'重得多。我们发现,使用非去耦D项可以轻松地在此模型中容纳125 GeV希格斯。尽管天鹅质量的下限很强,但我们发现在未来的希格斯工厂中,可能会观察到由希格斯环引起的希格斯与光子和胶子耦合的校正。我们还将简要讨论在拟议的100 TeV pp对撞机上发现天鹅的前景

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