Parameterization of general Z-γ-Z′mixing in an electroweak chiral theory
- ISSN号:1674-1137
- 期刊名称:《中国物理C:英文版》
- 时间:0
- 分类:O572.2[理学—粒子物理与原子核物理;理学—物理] TU243[建筑科学—建筑设计及理论]
- 作者机构:[1]School of Science, Xi'an Jiaotong University, Xi'an 710049, China, [2]College of Physics Science and Technology, Guangxi University, Nanning 530004, China, [3]Department of Physics, Tsinghua University, Beijing 100084, China, [4]Center for High Energy Physics, Tsinghua University, Beijing 100084, China, [5]Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
- 相关基金:Supported by National Natural Science Foundation of China (NSFC) under Grant Nos. 11147192, 11075085, and 11005084, Specialized Research Fund for the Doctoral Program of High Education of China No. 20110002110010, Fundamental Research Funds for the Central Universities, and Scientific Research Foundation of Guangxi University under Grant No. XBZ100686
关键词:
弱电, 空军基地, 标准模型, 标准偏差, 实验证据, 最大偏差, 物理学, SM, global fit, Z', anomaly free, chiral effective theory
中文摘要:
在 Z 杆 observables 之中, FB (0,b) 和 A e 显示从标准的中等大的标准差为预言建模。这结果能在 SM 以外为新物理作为独立试验性的证据被解释,就算在 LHC 的 125 GeV 象 Higgs 一样波色子最终作为 SM Higgs 被证实。全球 electroweak 与模型无关的 Z' 适合的 recalculated 证明 Z' 能同时压制 FB (0,b) 和 A 在 Z 杆的 e ,和还原剂在在我们的情形的到 1.0 的 SM 的从 2.6 的最大的偏差。Z' 恰当的结果也支持一个否定 S 参数。
英文摘要:
Among the Z-pole observables, AFB^(0,b) and Ae display moderately large standard deviations from the Standard Model predictions. This result can be interpreted as independent experimental evidence for new physics beyond the SM, even if the 125 GeV Higgs-like boson at the LHC is ultimately confirmed as the SM Higgs. A recalculated global electroweak fit with a model-independent Z' shows that Z' can simultaneously suppress AFB(0,b) and Ae at the Z-pole, and reduce the largest deviation from 2.6σ in SM to 1.0σ in our scenario. The Z' fitting results also support a negative S parameter.