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IMPROVED MEASUREMENTS OF ELECTROWEAK PARAMETERS FROM Z-DECAYS INTO FERMION PAIRS
其他题名1
ALEPH Collaboration
1992
发表期刊ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS
卷号53期号:1页码:1-20
通讯作者DECAMP, D (reprint author), CNRS,PHYS PARTICULES LAB,IN2P3,F-74019 ANNECY LE VIEUX,FRANCE.
文章类型Article
摘要The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs collected with the ALEPH detector at LEP. Assuming lepton universality, M(Z) = (91.182 +/- 0.009exp +/- 0.020L;P) GeV, GAMMA(Z) = (2484 +/- 17) MeV, sigma(had)0 = (41.44 +/- 0.36) nb, and GAMMA(had)/GAMMA(ll) = 21.00 +/- 0.20. The corresponding number of light neutrino species is 2.97 +/- 0.07. The forward-backward asymmetry in leptonic decays is used to determine the ratio of vector to axial-vector coupling constants of leptons: g(V)2(M(Z)2)/g(A)2(M(Z)2) = 0.0072 +/- 0.0027. Combining these results with ALEPH results on quark charge and bbBAR asymmetries, and tau-polarization, sin2 theta(W)(M(Z)2) = 0.2312 +/- 0.0018. In the context of the Minimal Standard Model, limits are placed on the top-quark mass.
学科领域Physics
收录类别SCI
WOS类目Physics, Particles & Fields
WOS记录号WOS:A1992HA66700001
引用统计
被引频次:83[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225392
专题实验物理中心
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ALEPH Collaboration. IMPROVED MEASUREMENTS OF ELECTROWEAK PARAMETERS FROM Z-DECAYS INTO FERMION PAIRS[J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,1992,53(1):1-20.
APA ALEPH Collaboration.(1992).IMPROVED MEASUREMENTS OF ELECTROWEAK PARAMETERS FROM Z-DECAYS INTO FERMION PAIRS.ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,53(1),1-20.
MLA ALEPH Collaboration."IMPROVED MEASUREMENTS OF ELECTROWEAK PARAMETERS FROM Z-DECAYS INTO FERMION PAIRS".ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 53.1(1992):1-20.
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