Measurement of the prompt J/psi pair production cross-section in pp collisions at root s=8 TeV with the ATLAS detector

doi:10.1140/epjc/s10052-017-4644-9

	Measurement of the prompt J/psi pair production cross-section in pp collisions at root s=8 TeV with the ATLAS detector
	ATLAS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2017
卷号	77 期号:2 页码:76
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-017-4644-9
文献子类	Article
英文摘要	The production of two prompt J/psi mesons, each with transverse momenta p(T) > 8.5 GeV and rapidity vertical bar y vertical bar < 2.1, is studied using a sample of proton-proton collisions at root s = 8 TeV, corresponding to an integrated luminosity of 11.4 fb(-1) collected in 2012 with the ATLAS detector at the LHC. The differential cross-section, assuming unpolarised J/psi production, is measured as a function of the transverse momentum of the lower-p(T) J/psi meson, di-J/psi p(T) and mass, the difference in rapidity between the two J/psi mesons, and the azimuthal angle between the two J/psi mesons. The fraction of prompt pair events due to double parton scattering is determined by studying kinematic correlations between the two J/psi mesons. The total and double parton scattering cross-sections are compared with predictions. The effective cross-section of double parton scattering is measured to be sigma(eff) = 6.3 +/- 1.6(stat) +/- 1.0(syst) mb.
电子版国际标准刊号	1434-6052
WOS关键词	DOUBLE PARTON SCATTERING ; PSI-PSI-PRODUCTION ; OCTET QUARKONIA PRODUCTION ; HIGH-ENERGY COLLIDERS ; HEAVY QUARKONIUM ; HADRONIC PRODUCTION ; MATRIX-ELEMENT ; HELAC-ONIA ; HADROPRODUCTION ; DISTRIBUTIONS
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000400004500001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284409]
专题	高能物理研究所_实验物理中心
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	ATLAS Collaboration. Measurement of the prompt J/psi pair production cross-section in pp collisions at root s=8 TeV with the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2017,77(2):76.
APA	ATLAS Collaboration.(2017).Measurement of the prompt J/psi pair production cross-section in pp collisions at root s=8 TeV with the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,77(2),76.
MLA	ATLAS Collaboration."Measurement of the prompt J/psi pair production cross-section in pp collisions at root s=8 TeV with the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 77.2(2017):76.