Global Electroweak Fit and Its Implication for Z' |
| |
| Authors: | ZHANG Ying JIANG Shao-Zhou WANG Qing |
| |
| Institution: | 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 |
| |
| Abstract: | 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. |
| |
| Keywords: | global fit Z anomaly free chiral effective theory |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
| 点击此处可从《理论物理通讯》下载免费的PDF全文 |
|
