Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP
文献类型：期刊论文
| 作者 | L3 Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2005 |
| 卷号 | 623期号:1-2页码:#REF! |
| 通讯作者 | Achard, P (reprint author), World Lab, FBLJA Project, CH-1211 Geneva, Switzerland. |
| 英文摘要 | The evolution of the electromagnetic coupling, alpha, in the momentum-transfer range 1800 GeV2 < -Q(2) < 21600 GeV2 is studied with about 40 000 Bhabha-scattering events collected with the L3 detector at LEP at centre-of-mass energies root s = 189-209 GeV. The running of a is parametrised as: alpha(Q(2)) = (1-C Delta alpha(Q2))/(alpha 0) where alpha(0) = alpha(Q(2) = 0) is the fine-structure constant and C = 1 corresponds to the evolution expected in QED. A fit to the differential cross section of the e(+)e(-) -> e(+)e(-) process for scattering angles in the range vertical bar cos theta vertical bar < 0.9 excludes the hypothesis of a constant value of alpha, C = 0, and validates the QED prediction with the result: C = 1.05 +/- 0.07 +/- 0.14, where the first uncertainty is statistical and the second systematic. (c) 2005 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| WOS记录号 | WOS:000232070900004 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/225585]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | L3 Collaboration. Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP[J]. PHYSICS LETTERS B,2005,623(1-2):#REF!. |
| APA | L3 Collaboration.(2005).Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP.PHYSICS LETTERS B,623(1-2),#REF!. |
| MLA | L3 Collaboration."Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP".PHYSICS LETTERS B 623.1-2(2005):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
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