Suppression of Lambda(1520) resonance production in central Pb-Pb collisions at root S-NN=2.76 TeV

doi:10.1103/PhysRevC.99.024905

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	Suppression of Lambda(1520) resonance production in central Pb-Pb collisions at root S-NN=2.76 TeV
	Acharya, S ; Adamova, D ; Adolfsson, J ; Aggarwal, MM ; Rinella, GA ; Agnello, M ; Agrawal, N ; Ahammed, Z ; Ahn, SU ; Aiola, S
刊名	PHYSICAL REVIEW C
	2019
卷号	99 期号:2 页码:—
关键词	FREEZE-OUT MODEL
ISSN号	2469-9985
DOI	10.1103/PhysRevC.99.024905
文献子类	期刊论文
英文摘要	The production yield of the Lambda(1520) baryon resonance is measured at midrapidity in Pb-Pb collisions at root S-NN = 2.76 TeV with the ALICE detector at the Large Hadron Collider (LHC). The measurement is performed in the Lambda(1520) -> pK(-) (and charge conjugate) hadronic decay channel as a function of the transverse momentum (p(T)) and collision centrality. The ratio of the P-T-integrated production of Lambda(1520) baryons relative to A baryons in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at the LHC and the first 3 sigma evidence of Lambda(1520) suppression within a single collision system. The measured Lambda(1520)/Lambda ratio in central collisions is smaller than the value predicted by the statistical hadronization model calculations. The shape of the measured p(T) distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31840]
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.IN2P3, Ctr Calcul, Lyon, France; 2.Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia; 3.Benemerita Univ Autonoma Puebla, Puebla, Mexico; 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 93407 USA; 9.Cent China Normal Univ, Wuhan, Hubei, Peoples R China; 10.Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba;
推荐引用方式 GB/T 7714	Acharya, S,Adamova, D,Adolfsson, J,et al. Suppression of Lambda(1520) resonance production in central Pb-Pb collisions at root S-NN=2.76 TeV[J]. PHYSICAL REVIEW C,2019,99(2):—.
APA	Acharya, S.,Adamova, D.,Adolfsson, J.,Aggarwal, MM.,Rinella, GA.,...&Zou, S.(2019).Suppression of Lambda(1520) resonance production in central Pb-Pb collisions at root S-NN=2.76 TeV.PHYSICAL REVIEW C,99(2),—.
MLA	Acharya, S,et al."Suppression of Lambda(1520) resonance production in central Pb-Pb collisions at root S-NN=2.76 TeV".PHYSICAL REVIEW C 99.2(2019):—.