MEASUREMENTS OF CROSS-SECTION AND CHARGE ASYMMETRY FOR E+E--]MU+MU- AND E+E--]TAU+TAU- AT ROOT-S=57.8 GEV
文献类型：期刊论文
| 作者 | AMY Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 1994 |
| 卷号 | 331期号:1-2页码:#REF! |
| 通讯作者 | VELISSARIS, C (reprint author), UNIV ROCHESTER,ROCHESTER,NY 14627, USA. |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| WOS记录号 | WOS:A1994NX25800034 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/227065]  |
| 专题 | 高能物理研究所_计算中心 |
| 推荐引用方式 GB/T 7714 | 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!. |
入库方式： OAI收割
来源：高能物理研究所
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