Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at root S-NN=8.16 TeV

doi:10.1140/epjc/s10052-019-6801-9

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at root S-NN=8.16 TeV
	Acharya, S ; Acosta, FT ; Adamova, D ; Adhya, SP ; Adler, A ; Adolfsson, J ; Aggarwal, MM ; Rinella, GA ; Agnello, M ; Ahammed, Z
刊名	EUROPEAN PHYSICAL JOURNAL C
	2019
卷号	79 期号:4 页码:—
关键词	AU COLLISIONS MULTIPLICITY DISTRIBUTIONS DEPENDENCE CENTRALITY
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-019-6801-9
文献子类	期刊论文
英文摘要	The pseudorapidity density of charged particles, dN(ch)/d eta, in p-Pb collisions has been measured at a centre of-mass energy per nucleon-nucleon pair of root S-NN = 8.16 TeV at mid-pseudorapidity for non-single-diffractive events. The results cover 3.6 units of pseudorapidity, vertical bar eta vertical bar < 1.8. The dN(ch)/d eta value is 19.1 +/- 0.7 at vertical bar eta vertical bar < 0.5. This quantity divided by < N-part >/2 is 4.73 +/- 0.20, where < N-part > is the average number of participating nucleons, is 9.5% higher than the corresponding value for p-Pb collisions at root S-NN = 5.02 TeV. Measurements are compared with models based on different mechanisms for particle production. All models agree within uncertainties with data in the Pb-going side, while HIJING overestimates, showing a symmetric behaviour, and EPOS underestimates the p-going side of the dN(ch)/d eta distribution. Saturation-based models reproduce the distributions well for eta > -1.3. The dN(ch)/d eta is also measured for different centrality estimators, based both on the charged particle multiplicity and on the energy deposited in the Zero Degree Calorimeters. A study of the implications of the large multiplicity fluctuations due to the small number of participants for systems like p-Pb in the centrality calculation for multiplicity-based estimators is discussed, demonstrating the advantages of determining the centrality with energy deposited near beam rapidity.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31508]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.CERN, CH-1211 Geneva 23, Switzerland; 2.Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia; 3.Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine; 4.Bose Inst, Dept Phys, Kolkata, India; 5.Bose Inst, CAPSS, Kolkata, India; 6.Budker Inst Nucl Phys, Novosibirsk, Russia; 7.Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA USA; 8.Cent China Normal Univ, Wuhan, Hubei, Peoples R China; 9.IN2P3, Ctr Calcul, Lyon, France; 10.Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba;
推荐引用方式 GB/T 7714	Acharya, S,Acosta, FT,Adamova, D,et al. Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at root S-NN=8.16 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2019,79(4):—.
APA	Acharya, S.,Acosta, FT.,Adamova, D.,Adhya, SP.,Adler, A.,...&Zurlo, N.(2019).Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at root S-NN=8.16 TeV.EUROPEAN PHYSICAL JOURNAL C,79(4),—.
MLA	Acharya, S,et al."Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at root S-NN=8.16 TeV".EUROPEAN PHYSICAL JOURNAL C 79.4(2019):—.