Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at root s(NN)=5.02 TeV

doi:10.1103/PhysRevLett.121.062002

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	Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at root s(NN)=5.02 TeV
	CMS Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2018
卷号	121 期号:6 页码:62002
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.121.062002
文献子类	Article
英文摘要	The pseudorapidity distributions of dijets as functions of their average transverse momentum (p(T)(ave)) are measured in proton-lead (pPb) and proton-proton (pp) collisions. The data samples were collected by the CMS experiment at the CERN LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. A significant modification of the pPb spectra with respect to the pp spectra is observed in all p(T)(ave) intervals investigated. The ratios of the pPb and pp distributions are compared to next-to-leading order perturbative quantum chromodynamics calculations with unbound nucleon and nuclear parton distribution functions (PDFs). These results give the first evidence that the gluon PDF at large Bjorken x in lead ions is strongly suppressed with respect to the PDF in unbound nucleons.
电子版国际标准刊号	1079-7114
WOS关键词	TRANSVERSE-MOMENTUM ; JET PRODUCTION ; PB COLLISIONS ; PARTICLE-PRODUCTION ; DEPENDENCE ; PDFS ; CENTRALITY ; RAPIDITY ; SPECTRA
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000441021400008
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286271]
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. Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at root s(NN)=5.02 TeV[J]. PHYSICAL REVIEW LETTERS,2018,121(6):62002.
APA	CMS Collaboration.(2018).Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at root s(NN)=5.02 TeV.PHYSICAL REVIEW LETTERS,121(6),62002.
MLA	CMS Collaboration."Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at root s(NN)=5.02 TeV".PHYSICAL REVIEW LETTERS 121.6(2018):62002.