Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 TeV

doi:10.1016/j.physletb.2019.05.028

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	Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 TeV
	Acharya, S ; Acosta, FT ; Adamova, D ; Adhya, SP ; Adler, A ; Adolfsson, J ; Aggarwal, MM ; Rinella, GA ; Agnello, M ; Ahammed, Z
刊名	PHYSICS LETTERS B
	2019
卷号	794 期号:-页码:50—63
关键词	DEUTERON PRODUCTION PROTON PARTICLES SPECTRA SEARCH
ISSN号	0370-2693
DOI	10.1016/j.physletb.2019.05.028
文献子类	期刊论文
英文摘要	In this letter, the production of deuterons and anti-deuterons in pp collisions at root s = 7 TeV is studied as a function of the charged-particle multiplicity density at mid-rapidity with the ALICE detector at the LHC. Production yields are measured at mid-rapidity in five multiplicity classes and as a function of the deuteron transverse momentum (p(T)). The measurements are discussed in the context of hadron-coalescence models. The coalescence parameter B-2, extracted from the measured spectra of (anti-)deuteronsand primary (anti-)protons, exhibits no significant p(T)-dependence for p(T) < 3 GeV/c, in agreement with the expectations of a simple coalescence picture. At fixed transverse momentum per nucleon, the B-2 parameter is found to decrease smoothly from low multiplicity pp to Pb-Pb collisions, in qualitative agreement with more elaborate coalescence models. The measured mean transverse momentum of (anti-)deuterons in pp is not reproduced by the Blast-Wave model calculations that simultaneously describe pion, kaon and proton spectra, in contrast to central Pb-Pb collisions. The ratio between the p(T)-integrated yield of deuterons to protons, d/p, is found to increase with the charged-particle multiplicity, as observed in inelastic pp collisions at different centre-of-mass energies. The d/p ratios are reported in a wide range, from the lowest to the highest multiplicity values measured in pp collisions at the LHC. (C) 2019 The Author(s). Published by Elsevier B.V
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31717]
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.Univ Tokyo, Tokyo, Japan; 2.Ctr Fermi, Museo Stor Fis, Rome, Italy; 3.Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia; 4.Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine; 5.Bose Inst, Dept Phys, Kolkata, India; 6.CAPSS, Kolkata, India; 7.Budker Inst Nucl Phys, Novosibirsk, Russia; 8.Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA USA; 9.Cent China Normal Univ, Wuhan, Hubei, Peoples R China; 10.Ctr Calcul IN2P3, Lyon, France;
推荐引用方式 GB/T 7714	Acharya, S,Acosta, FT,Adamova, D,et al. Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2019,794(-):50—63.
APA	Acharya, S.,Acosta, FT.,Adamova, D.,Adhya, SP.,Adler, A.,...&Zurlo, N.(2019).Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 TeV.PHYSICS LETTERS B,794(-),50—63.
MLA	Acharya, S,et al."Multiplicity dependence of (anti-)deuteron production in pp collisions at root s=7 TeV".PHYSICS LETTERS B 794.-(2019):50—63.