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	Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV
	CMS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2016
卷号	76期号:10
DOI	10.1140/epjc/s10052-016-4346-8
英文摘要	A measurement of the decorrelation of azimuthal angles between the two jets with the largest transverse momenta is presented for seven regions of leading jet transverse momentum up to 2.2. The analysis is based on the proton-proton collision data collected with the CMS experiment at a centre-of-mass energy of 8 corresponding to an integrated luminosity of 19.7. The dijet azimuthal decorrelation is caused by the radiation of additional jets and probes the dynamics of multijet production. The results are compared to fixed-order predictions of perturbative quantum chromodynamics (QCD), and to simulations using Monte Carlo event generators that include parton showers, hadronization, and multiparton interactions. Event generators with only two outgoing high transverse momentum partons fail to describe the measurement, even when supplemented with next-to-leading-order QCD corrections and parton showers. Much better agreement is achieved when at least three outgoing partons are complemented through either next-to-leading-order predictions or parton showers. This observation emphasizes the need to improve predictions for multijet production.
语种	英语
WOS记录号	WOS:000388965500001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/260753]
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 dijet azimuthal decorrelation in pp collisions at root s=8 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2016,76(10).
APA	CMS Collaboration.(2016).Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV.EUROPEAN PHYSICAL JOURNAL C,76(10).
MLA	CMS Collaboration."Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV".EUROPEAN PHYSICAL JOURNAL C 76.10(2016).

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