中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV

文献类型:期刊论文

作者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
出版日期2019
卷号99期号:2页码:
ISSN号2469-9985
关键词PB-PB COLLISIONS TRANSVERSE-MOMENTUM FREEZE-OUT STATISTICAL HADRONIZATION PARTICLE RESONANCES PHYSICS PROTON PIONS MODEL
DOI10.1103/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
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;
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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):—.

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来源:上海应用物理研究所

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