STUDY OF THE SUBJET STRUCTURE OF QUARK AND GLUON JETS
ALEPH Collaboration
刊名PHYSICS LETTERS B
1995
卷号346期号:3-4页码:#REF!
学科分类Physics
DOI10.1016/0370-2693(95)00037-L
通讯作者BUSKULIC, D (reprint author), INST NATL PHYS NUCL & PHYS PARTICULES, CNRS, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE.
文章类型Article
英文摘要Measurements of the subjet structure of quark and gluon jets in hadronic Z decays are presented. The analysis is based on one million hadronic events recorded by the ALEPH detector. Roughly symmetric three-jet events are selected with a coarse jet-resolution cut-off, y(1). Gluon jets are identified with a purity of 94.6% in those events where evidence of long-lived heavy-flavour hadrons in the other two jets is found. The jets are then analyzed using a smaller cut-off y(0) (< y(1)) so that subjets are resolved. The properties of the jets (subjet multiplicities [N-q], [N-g] and rates R(n)(g(q)) for n = 1,2,3,4) are determined and are found to be in good agreement with the expectations of perturbative QCD as long as the subjet resolution parameter y(0) is sufficiently large to keep non-perturbative effects small. In particular, the ratio [N-g - 1]/[N-q - 1], which to leading order in QCD is given by the ratio of colour factors C-A/C-F = 9/4, is measured to be 1.96 +/- 0.15 for y(0) = 2 . 10(-3), but falls to 1.29 +/- 0.03 for y(0) = 1.6 . 10(-5).
类目[WOS]Physics, Multidisciplinary
收录类别SCI
WOS记录号WOS:A1995QM41800026
引用统计
被引频次:32[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/311005/227611
专题中国科学院高能物理研究所_实验物理中心_期刊论文
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ALEPH Collaboration. STUDY OF THE SUBJET STRUCTURE OF QUARK AND GLUON JETS[J]. PHYSICS LETTERS B,1995,346(3-4):#REF!.
APA ALEPH Collaboration.(1995).STUDY OF THE SUBJET STRUCTURE OF QUARK AND GLUON JETS.PHYSICS LETTERS B,346(3-4),#REF!.
MLA ALEPH Collaboration."STUDY OF THE SUBJET STRUCTURE OF QUARK AND GLUON JETS".PHYSICS LETTERS B 346.3-4(1995):#REF!.
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