Single and multi-photon events with missing energy e(+)e(-)collisions at root s=189 GeV
文献类型：期刊论文
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 1999 |
| 卷号 | 470期号:1--4页码:268-280 |
| 关键词 | DYNAMICAL SUPERSYMMETRY BREAKING MONTE-CARLO PROGRAM E+E ANNIHILATION LIGHT GRAVITINO E(+)E(-) COLLISIONS L3 EXPERIMENT BHABHA SCATTERING STANDARD MODEL SCALE LEP |
| 通讯作者 | Acciarri, M (reprint author), Ist Nazl Fis Nucl, Sez Milan, Via Celoria 16, I-20133 Milan, Italy. |
| 英文摘要 | Single and multi-photon events with missing energy are analysed using data collected with the L3 detector at LEP at a centre-of-mass energy of 189 GeV, for a total of 176 pb(-1) of integrated luminosity. The cross section of the process e(+)e(-) --> nu<(nu)over bar>gamma(gamma) is measured and the number of light neutrino flavours is determined to be N-nu= 3.011 +/- 0.077 including lower energy data. Upper limits on cross sections of supersymmetric processes are set and interpretations in supersymmetric models provide improved limits on the masses of the lightest neutralino and the gravitino. Graviton-photon production in low scale gravity models with extra dimensions is searched for and limits on the energy scale of the model are set exceeding 1 TeV for two extra dimensions. (C) 1999 Elsevier Science B.V. All rights reserved. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000084394100041 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212008]  |
| 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 | . Single and multi-photon events with missing energy e(+)e(-)collisions at root s=189 GeV[J]. PHYSICS LETTERS B,1999,470(1--4):268-280. |
| APA | (1999).Single and multi-photon events with missing energy e(+)e(-)collisions at root s=189 GeV.PHYSICS LETTERS B,470(1--4),268-280. |
| MLA | "Single and multi-photon events with missing energy e(+)e(-)collisions at root s=189 GeV".PHYSICS LETTERS B 470.1--4(1999):268-280. |
入库方式： OAI收割
来源：高能物理研究所
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