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Measurement of the properties of a Higgs boson in the four-lepton final state
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2014 |
| 卷号 | 89期号:9 |
| 关键词 | HADRON-HADRON COLLISIONS ABELIAN GAUGE-THEORIES ATLAS DETECTOR PARTON DISTRIBUTIONS MASSLESS PARTICLES BROKEN SYMMETRIES WEAK INTERACTIONS ROOT-S=7 TEV LHC MODEL |
| 通讯作者 | Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia. |
| 英文摘要 | The properties of a Higgs boson candidate are measured in the H -> ZZ -> 4l decay channel, with l = e, mu, using data from pp collisions corresponding to an integrated luminosity of 5.1 fb(-1) at the center-of-mass energy of root s = 7 TeV and 19.7 fb(-1) at ffiffiffi root s = 8 TeV, recorded with the CMS detector at the LHC. The new boson is observed as a narrow resonance with a local significance of 6.8 standard deviations, a measured mass of 125.6 +/- 0.4(stat) +/- 0.2(syst) GeV, and a total width <= 3.4 GeV at the 95% confidence level. The production cross section of the new boson times its branching fraction to four leptons is measured to be 0.93(-0.23)(+0.26) (stat)(-0.09)(+0.13) (syst) times that predicted by the standard model. Its spin-parity properties are found to be consistent with the expectations for the standard-model Higgs boson. The hypotheses of a pseudoscalar and all tested spin-1 boson hypotheses are excluded at the 99% confidence level or higher. All tested spin-2 boson hypotheses are excluded at the 95% confidence level or higher. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000335914900002 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213708]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 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 | CMS Collaboration. Measurement of the properties of a Higgs boson in the four-lepton final state[J]. PHYSICAL REVIEW D,2014,89(9). |
| APA | CMS Collaboration.(2014).Measurement of the properties of a Higgs boson in the four-lepton final state.PHYSICAL REVIEW D,89(9). |
| MLA | CMS Collaboration."Measurement of the properties of a Higgs boson in the four-lepton final state".PHYSICAL REVIEW D 89.9(2014). |
入库方式： OAI收割
来源：高能物理研究所
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