A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP
L3 Collaboration
刊名PHYSICS LETTERS B
1992
卷号275期号:1-2页码:#REF!
学科分类Physics
DOI10.1016/0370-2693(92)90877-7
通讯作者ADEVA, B (reprint author), CERN,EUROPEAN LAB PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND.
文章类型Article
英文摘要The L3 detector at LEP has been used to determine the number of light neutrino families by measuring the cross section of single photon even in e+e- collisions at energies near the Z0 resonance. We have observed 61 single photon candidates with more than 1.5 GeV of deposited energy in the barrel electromagnetic calorimeter, for a total integrated luminosity of 3.0 pb-1. From a likelihood fit to the single photon cross sections, we determine N(nu) = 3.24 +/- 0.46 (statistical) +/- 0.22 (systematic).
类目[WOS]Physics, Multidisciplinary
收录类别SCI
WOS记录号WOS:A1992HE83600037
引用统计
被引频次:28[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/311005/226956
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
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L3 Collaboration. A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP[J]. PHYSICS LETTERS B,1992,275(1-2):#REF!.
APA L3 Collaboration.(1992).A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP.PHYSICS LETTERS B,275(1-2),#REF!.
MLA L3 Collaboration."A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP".PHYSICS LETTERS B 275.1-2(1992):#REF!.
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