Measurement of four-jet production in proton-proton collisions at root s=7 TeV

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	Measurement of four-jet production in proton-proton collisions at root s=7 TeV
	CMS Collaboration
刊名	PHYSICAL REVIEW D
	2014
卷号	89 期号:9
关键词	DOUBLE PARTON SCATTERING (P)OVER-BAR-P COLLISIONS S=1.8 TEV
通讯作者	Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	Measurements of the differential cross sections for the production of exactly four jets in proton-proton collisions are presented as a function of the transverse momentum p(T) and pseudorapidity eta, together with the correlations in azimuthal angle and the p(T) balance among the jets. The data sample was collected in 2010 at a center-of-mass energy of 7 TeV with the CMS detector at the LHC, with an integrated luminosity of 36 pb(-1). The cross section for exactly four jets, with two hard jets of p(T) > 50 GeV each, together with two jets of p(T) > 20 GeV each, within vertical bar eta vertical bar < 4.7 is measured to be sigma = 330 +/- 5(stat.) +/- 45(syst.) nb. It is found that fixed-order matrix element calculations including parton showers describe the measured differential cross sections in some regions of phase space only, and that adding contributions from double parton scattering brings the Monte Carlo predictions closer to the data.
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:000336759700001
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213716]
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 four-jet production in proton-proton collisions at root s=7 TeV[J]. PHYSICAL REVIEW D,2014,89(9).
APA	CMS Collaboration.(2014).Measurement of four-jet production in proton-proton collisions at root s=7 TeV.PHYSICAL REVIEW D,89(9).
MLA	CMS Collaboration."Measurement of four-jet production in proton-proton collisions at root s=7 TeV".PHYSICAL REVIEW D 89.9(2014).