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Observation of the diphoton decay of the Higgs boson and measurement of its properties
CMS Collaboration
2014
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号74期号:10
通讯作者Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1 fb(-1) at root s = 7 TeV and 19.7 fb(-1) at 8 TeV. A clear signal is observed in the diphoton channel at a mass close to 125 GeV with a local significance of 5.7 sigma, where a significance of 5.2 sigma is expected for the standard model Higgs boson. The mass is measured to be 124.70 +/- 0.34 GeV = 124.70 +/- 0.31 (stat) +/- 0.15 (syst) GeV, and the best-fit signal strength relative to the standard model prediction is 1.14(-0.23)(+0.26) = 1.14 +/- 0.21 (stat) (-0.05)(+0.09) (syst) (+0.13)(-0.09) (theo). Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models.
关键词PROTON-PROTON COLLISIONS PP COLLISIONS TRANSVERSE-MOMENTUM ATLAS DETECTOR ROOT-S=7 TEV MASSLESS PARTICLES BROKEN SYMMETRIES LHC SEARCH MODEL
学科领域Physics
DOI10.1140/epjc/s10052-014-3076-z
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000346419300001
引用统计
被引频次:140[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213834
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Observation of the diphoton decay of the Higgs boson and measurement of its properties[J]. EUROPEAN PHYSICAL JOURNAL C,2014,74(10).
APA CMS Collaboration.(2014).Observation of the diphoton decay of the Higgs boson and measurement of its properties.EUROPEAN PHYSICAL JOURNAL C,74(10).
MLA CMS Collaboration."Observation of the diphoton decay of the Higgs boson and measurement of its properties".EUROPEAN PHYSICAL JOURNAL C 74.10(2014).
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