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A DIRECT MEASUREMENT OF THE INVISIBLE WIDTH OF THE Z FROM SINGLE-PHOTON COUNTING
ALEPH Collaboration
1993
发表期刊PHYSICS LETTERS B
卷号313期号:3-4页码:#REF!
通讯作者BUSKULIC, D (reprint author), CNRS, IN2P3, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE.
文章类型Article
摘要The ALEPH detector at LEP is used to study single photon events in e+e- collisions at the Z resonance. In a total data sample of 15.7 pb-1 taken in 1990 and 1991 scanning the resonance, 400 events were recorded where each has a single deposition of more than 1.5 GeV measured in the polar angular region \costheta(gamma)\ < 0.74 of the electromagnetic calorimeter. It is shown that this number of events can be accounted for by known processes. After subtraction of background events, the invisible width of the Z is determined to be 450 +/- 34(stat.) +/- 34(syst.) MeV. Using Z resonance parameters derived by ALEPH, the corresponding number of light neutrino generations is found to be 2.68 +/- 0.20(stat.) +/- 0.20(syst.).
学科领域Physics
DOI10.1016/0370-2693(93)90027-F
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:A1993LV80400027
引用统计
被引频次:44[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/311005/227709
专题实验物理中心
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ALEPH Collaboration. A DIRECT MEASUREMENT OF THE INVISIBLE WIDTH OF THE Z FROM SINGLE-PHOTON COUNTING[J]. PHYSICS LETTERS B,1993,313(3-4):#REF!.
APA ALEPH Collaboration.(1993).A DIRECT MEASUREMENT OF THE INVISIBLE WIDTH OF THE Z FROM SINGLE-PHOTON COUNTING.PHYSICS LETTERS B,313(3-4),#REF!.
MLA ALEPH Collaboration."A DIRECT MEASUREMENT OF THE INVISIBLE WIDTH OF THE Z FROM SINGLE-PHOTON COUNTING".PHYSICS LETTERS B 313.3-4(1993):#REF!.
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