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MEASUREMENTS OF CROSS-SECTION AND CHARGE ASYMMETRY FOR E+E--]MU+MU- AND E+E--]TAU+TAU- AT ROOT-S=57.8 GEV
AMY Collaboration
1994
发表期刊PHYSICS LETTERS B
卷号331期号:1-2页码:#REF!
通讯作者VELISSARIS, C (reprint author), UNIV ROCHESTER,ROCHESTER,NY 14627, USA.
摘要With data corresponding to 142 pb-1 accumulated at square-root s = 57.8 GeV by the AMY detector at TRISTAN we measure the cross section of the reactions e+e- --> mu+mu- and e+e- --> tau+tau- and the asymmetry in the angular distributions. For the lowest order cross section we obtain sigma(mumu) = 27.54 +/- 0.65 +/- 0.95 pb and sigma(tautau) = 28.27 +/- 0.87 +/- 0.69 pb, and for the forward-backward asymmetry, A(mumu) = -0.303 +/- 0.027 +/- 0.008 and A(tautau) = -0.291 +/- 0.040 +/- 0.019. These measurements agree with the standard model. Assuming e-mu-tau universality we extract the vector and axial coupling constants \gv\ = 0.00 +/- 0.09 and \g(A)\ = 0.476 +/- 0.024. A fit of the data to composite models places lower bounds (95% confidence level) on the compositeness scale of 2-4 TeV.
文章类型Article
学科领域Physics
DOI10.1016/0370-2693(94)90967-9
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:A1994NX25800034
引用统计
被引频次:11[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/311005/227065
专题计算中心
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AMY Collaboration. MEASUREMENTS OF CROSS-SECTION AND CHARGE ASYMMETRY FOR E+E--]MU+MU- AND E+E--]TAU+TAU- AT ROOT-S=57.8 GEV[J]. PHYSICS LETTERS B,1994,331(1-2):#REF!.
APA AMY Collaboration.(1994).MEASUREMENTS OF CROSS-SECTION AND CHARGE ASYMMETRY FOR E+E--]MU+MU- AND E+E--]TAU+TAU- AT ROOT-S=57.8 GEV.PHYSICS LETTERS B,331(1-2),#REF!.
MLA AMY Collaboration."MEASUREMENTS OF CROSS-SECTION AND CHARGE ASYMMETRY FOR E+E--]MU+MU- AND E+E--]TAU+TAU- AT ROOT-S=57.8 GEV".PHYSICS LETTERS B 331.1-2(1994):#REF!.
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