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MEASUREMENT OF ALPHA-S FROM THE STRUCTURE OF PARTICLE CLUSTERS PRODUCED IN HADRONIC Z-DECAYS
ALEPH COLLABORATION
1991
发表期刊PHYSICS LETTERS B
卷号257期号:3--4页码:479-491
通讯作者DECAMP, D (reprint author), CNRS, IN2P3, LAB PHYS PARTICULES LAPP, F-74019 ANNECY LE VIEUX, FRANCE.
摘要Using 106 000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z resonance peak, the strong coupling constant alpha-s is measured by an analysis of energy-energy correlations (EEC) and the global event shape variables thrust. C-parameter and oblateness. It is shown that the theoretical uncertainties can be significantly reduced if the final state particles are first combined in clusters using a minimum scaled invariant mass cut, y(cut), before these variables are computed. The combined result from all shape variables of pre-clustered events is alpha-s(M(Z)2) = 0.117 +/- 0.005 for a renormalization scale mu = 1/2M(Z). For mu-values between M(Z) and the b-quark mass, the result changes by -0.009(+0.006).
关键词QUANTUM CHROMODYNAMICS E+E-ANNIHILATION MONTE-CARLO QCD
学科领域Physics
DOI10.1016/0370-2693(91)91926-M
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:A1991FG03900040
引用统计
被引频次:43[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/311005/213865
专题实验物理中心
作者单位中国科学院高能物理研究所
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ALEPH COLLABORATION. MEASUREMENT OF ALPHA-S FROM THE STRUCTURE OF PARTICLE CLUSTERS PRODUCED IN HADRONIC Z-DECAYS[J]. PHYSICS LETTERS B,1991,257(3--4):479-491.
APA ALEPH COLLABORATION.(1991).MEASUREMENT OF ALPHA-S FROM THE STRUCTURE OF PARTICLE CLUSTERS PRODUCED IN HADRONIC Z-DECAYS.PHYSICS LETTERS B,257(3--4),479-491.
MLA ALEPH COLLABORATION."MEASUREMENT OF ALPHA-S FROM THE STRUCTURE OF PARTICLE CLUSTERS PRODUCED IN HADRONIC Z-DECAYS".PHYSICS LETTERS B 257.3--4(1991):479-491.
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