论文标题
重型向量共振与标准模型相结合的有效现场理论
Effective Field Theory for Heavy Vector Resonances Coupled to the Standard Model
论文作者
论文摘要
我们构建了一个有效的现场理论，描述了在标准模型粒子中描述重矢量共振$ V $的衰减。有效理论是使用称为ccet $ _ {\ rm bsm} $的软共线有效理论扩展的，该理论提供了一个严格的框架，用于参数化衰减矩阵元素，其明显的电源计数以电动eak量表的比例和谐振质量的比例和弥补的质量，$λ\ sim \ sim \ sim v/m_v $。使用有效的拉格朗日中耦合的重归化组演变，与该量表比率相关的大对数可以重新亮相到所有订单。我们详细考虑了重型$ Z'$ Boson的两体衰变以及在$λ$中的领导和转向订单的Kaluza-Klein Gluon的两体衰变。我们将匹配介绍到cot $ _ {\ rm bsm} $上，并带有紫外线完整的新物理模型的具体示例。
We construct an effective field theory describing the decays of a heavy vector resonance $V$ into Standard Model particles. The effective theory is built using an extension of Soft-Collinear Effective Theory called SCET$_{\rm BSM}$, which provides a rigorous framework for parameterizing decay matrix elements with manifest power counting in the ratio of the electroweak scale and the mass of the resonance, $λ\sim v/m_V$. Using the renormalization-group evolution of the couplings in the effective Lagrangian, large logarithms associated with this scale ratio can be resummed to all orders. We consider in detail the two-body decays of a heavy $Z'$ boson and of a Kaluza-Klein gluon at leading and subleading order in $λ$. We illustrate the matching onto SCET$_{\rm BSM}$ with a concrete example of a UV-complete new-physics model.
