Observation of the diphoton decay of the Higgs boson and measurement of its properties

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	Observation of the diphoton decay of the Higgs boson and measurement of its properties
	CMS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2014
卷号	74 期号:10
关键词	PROTON-PROTON COLLISIONS PP COLLISIONS TRANSVERSE-MOMENTUM ATLAS DETECTOR ROOT-S=7 TEV MASSLESS PARTICLES BROKEN SYMMETRIES LHC SEARCH MODEL
通讯作者	Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	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.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000346419300001
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213834]
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. 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).