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 be...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.展开更多
基金Supported by National Natural Science Foundation of China(NSFC)under Grant Nos.11147192,11075085,and 11005084Specialized Research Fund for the Doctoral Program of High Education of China No.20110002110010+1 种基金Fundamental Research Funds for the Central UniversitiesScientific Research Foundation of Guangxi University under Grant No.XBZ100686
文摘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.
