Single- and multi-photon production in e(+)e(-) collisions at root s up to 209 GeV
文献类型：期刊论文
| ; | |
| 作者 | ALEPH Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 ; EUROPEAN PHYSICAL JOURNAL C
|
| 出版日期 | 2003 ; 2003 |
| 卷号 | 28期号:1页码:1-13 |
| 关键词 | LOW-ENERGY SUPERSYMMETRY MISSING ENERGY ROOT-S=189 GEV FINAL-STATES MONTE-CARLO COLLIDERS EVENTS LEP BREAKING SEARCH LOW-ENERGY SUPERSYMMETRY MISSING ENERGY ROOT-S=189 GEV FINAL-STATES MONTE-CARLO COLLIDERS EVENTS LEP BREAKING SEARCH |
| DOI | 10.1140/epjc/s2002-01129-7 |
| 通讯作者 | Heister, A (reprint author), Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany. ; Heister, A (reprint author), Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany. |
| 英文摘要 | Events containing only energetic photons are analysed in a sample of 628 pb(-1) of data recorded from e(+)e(-) collisions at centre-of-mass energies between 189 and 209 GeV by the ALEPH detector at LEP. The e(+)e(-) --> upsilon(upsilon) over bar gamma(gamma) and e(+)e(-) --> gammagamma(gamma) cross sections are measured and found to be in agreement with the standard model predictions. The number of light neutrino generations is determined to be N-upsilon = 2.86 +/- 0.09. Upper limits are derived on the cross sections for photon production in the context of several supersymmetric models. Limits are also set on the parameters of models with extra spatial dimensions, with contact interactions and with excited electrons.; Events containing only energetic photons are analysed in a sample of 628 pb(-1) of data recorded from e(+)e(-) collisions at centre-of-mass energies between 189 and 209 GeV by the ALEPH detector at LEP. The e(+)e(-) --> upsilon(upsilon) over bar gamma(gamma) and e(+)e(-) --> gammagamma(gamma) cross sections are measured and found to be in agreement with the standard model predictions. The number of light neutrino generations is determined to be N-upsilon = 2.86 +/- 0.09. Upper limits are derived on the cross sections for photon production in the context of several supersymmetric models. Limits are also set on the parameters of models with extra spatial dimensions, with contact interactions and with excited electrons. |
| 学科主题 | Physics ; Physics |
| 类目[WOS] | Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 ; 英语 |
| WOS记录号 | WOS:000183398700001 ; WOS:000183398700001 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212289]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | ALEPH Collaboration. Single- and multi-photon production in e(+)e(-) collisions at root s up to 209 GeV, Single- and multi-photon production in e(+)e(-) collisions at root s up to 209 GeV[J]. EUROPEAN PHYSICAL JOURNAL C, EUROPEAN PHYSICAL JOURNAL C,2003, 2003,28, 28(1):1-13, 1-13. |
| APA | ALEPH Collaboration.(2003).Single- and multi-photon production in e(+)e(-) collisions at root s up to 209 GeV.EUROPEAN PHYSICAL JOURNAL C,28(1),1-13. |
| MLA | ALEPH Collaboration."Single- and multi-photon production in e(+)e(-) collisions at root s up to 209 GeV".EUROPEAN PHYSICAL JOURNAL C 28.1(2003):1-13. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。