Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV

doi:10.1103/PhysRevC.99.024906

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

	Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV
	Acharya, S ; Acosta, FT ; Adamova, D ; Adler, A ; Adolfsson, J ; Aggarwal, MM ; Rinella, GA ; Agnello, M ; Agrawal, N ; Ahammed, Z
刊名	PHYSICAL REVIEW C
	2019
卷号	99 期号:2 页码:—
关键词	PB-PB COLLISIONS TRANSVERSE-MOMENTUM FREEZE-OUT STATISTICAL HADRONIZATION PARTICLE RESONANCES PHYSICS PROTON PIONS MODEL
ISSN号	2469-9985
DOI	10.1103/PhysRevC.99.024906
文献子类	期刊论文
英文摘要	Comprehensive results on the production of unidentified charged particles, pi(+/-), K-+/-, K-s(0), K*(892)(0), p, (p) over bar, phi(1020), Lambda, (Lambda) over bar, Xi(-) , (Xi) over bar (+), Omega(-), and (Omega) over bar (+) hadrons in proton-proton (pp) collisions at root s = 7 TeV at midrapidity (vertical bar y vertical bar < 0.5) as a function of charged-particle multiplicity density are presented. In order to avoid autocorrelation biases, the actual transverse momentum (p(T)) spectra of the particles under study and the event activity are measured in different rapidity windows. In the highest multiplicity class, the charged-particle density reaches about 3.5 times the value measured in inelastic collisions. While the yield of protons normalized to pions remains approximately constant as a function of multiplicity, the corresponding ratios of strange hadrons to pions show a significant enhancement that increases with increasing strangeness content. Furthermore, all identified particleto-pion ratios are shown to depend solely on charged-particle multiplicity density, regardless of system type and collision energy. The evolution of the spectral shapes with multiplicity and hadron mass shows patterns that are similar to those observed in p-Pb and Pb-Pb collisions at Large Hadron Collider energies. The obtained p(T), distributions and yields are compared to expectations from QCD-based pp event generators as well as to predictions from thermal and hydrodynamic models. These comparisons indicate that traces of a collective, equilibrated system are already present in high-multiplicity pp collisions.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31718]
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 Wroclaw, Inst Theoret Phys, Wroclaw, Poland 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.CAPSS, Kolkata, India; 6.Budker Inst Nucl Phys, Novosibirsk, Russia; 7.Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 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. Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV[J]. PHYSICAL REVIEW C,2019,99(2):—.
APA	Acharya, S.,Acosta, FT.,Adamova, D.,Adler, A.,Adolfsson, J.,...&Zmeskal, J.(2019).Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV.PHYSICAL REVIEW C,99(2),—.
MLA	Acharya, S,et al."Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV".PHYSICAL REVIEW C 99.2(2019):—.