Pseudo-observables in Higgs decays
Pseudo-observables in Higgs decays
复制标题
DOI：
10.1140/epjc/s10052-015-3345-5
复制
发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
M. González-Alonso;A. Greljo;G. Isidori;D. Marzocca
中科院分区：
文献类型：
--
作者：
M. González-Alonso;A. Greljo;G. Isidori;D. Marzocca
我们定义了一组伪观测特性的希格斯衰变的标准模型的通用扩展没有新的粒子低于希格斯质量。伪观测量可以从实验数据中确定，提供了一个系统的概括的“框架”迄今为止所采用的LHC实验。伪观测量是从壳层衰变振幅定义的，允许系统地包含高阶QED和QCD修正，并且可以在任何有效场论（EFT）方法中计算希格斯物理。我们分析了从轻子普适性、CP不变性、保管对称性和线性实现的电弱对称性破缺的假设中减少的独立伪观测量的数量。我们概述了运动学研究的重要性ofdecays提取这样的参数，并提出他们的预测在线性EFT框架。
We define a set of pseudo-observables characterizing the properties of Higgs decays in generic extensions of the Standard Model with no new particles below the Higgs mass. The pseudo-observables can be determined from experimental data, providing a systematic generalization of the “-framework” so far adopted by the LHC experiments. The pseudo-observables are defined from on-shell decay amplitudes, allow for a systematic inclusion of higher-order QED and QCD corrections, and can be computed in any Effective Field Theory (EFT) approach to Higgs physics. We analyze the reduction of the number of independent pseudo-observables following from the hypotheses of lepton universality, CP invariance, custodial symmetry, and linearly realized electroweak symmetry breaking. We outline the importance of kinematical studies ofdecays for the extraction of such parameters and present their predictions in the linear EFT framework.