Multiparticle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider

被引:177
作者
Abelev, B. [1 ]
Adam, J. [2 ]
Adamova, D. [3 ]
Aggarwal, M. M. [4 ]
Rinella, G. Aglieri [5 ]
Agnello, M. [6 ,7 ]
Agostinelli, A. [8 ,9 ]
Agrawal, N. [10 ]
Ahammed, Z. [11 ]
Ahmad, N. [12 ]
Ahmed, I. [13 ]
Ahn, S. U. [14 ]
Ahn, S. A. [14 ]
Aimo, I. [6 ,7 ]
Aiola, S. [15 ]
Ajaz, M. [13 ]
Akindinov, A. [16 ]
Alam, S. N. [11 ]
Aleksandrov, D. [17 ]
Alessandro, B. [6 ]
Alexandre, D. [18 ]
Alici, A. [9 ,19 ,20 ]
Alkin, A. [21 ]
Alme, J. [22 ]
Alt, T. [23 ]
Altinpinar, S. [24 ]
Altsybeev, I. [25 ]
Alves Garcia Prado, C. [26 ]
Andrei, C. [27 ,28 ]
Andronic, A. [29 ]
Anguelov, V. [30 ]
Anielski, J.
Anticic, T. [31 ]
Antinori, F. [32 ]
Antonioli, P. [9 ]
Aphecetche, L. [33 ]
Appelshaeuser, H. [34 ]
Arcelli, S. [8 ,9 ]
Armesto, N. [35 ,36 ]
Arnaldi, R. [6 ]
Aronsson, T. [15 ]
Arsene, I. C. [29 ,37 ]
Arslandok, M. [34 ]
Augustinus, A. [5 ]
Averbeck, R. [29 ]
Awes, T. C. [38 ]
Azmi, M. D. [12 ,39 ]
Bach, M. [23 ]
Badala, A. [40 ]
Baek, Y. W. [41 ,42 ]
机构
[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[2] Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech Republic
[3] Acad Sci Czech Republ, Inst Nucl Phys, CZ-25068 Rez, Czech Republic
[4] Panjab Univ, Dept Phys, Chandigarh 160014, India
[5] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland
[6] Sezione Ist Nazl Fis Nucl, Turin, Italy
[7] Politecn Torino, Turin, Italy
[8] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[9] Sezione Ist Nazl Fis Nucl, Bologna, Italy
[10] Indian Inst Technol, Bombay 400076, Maharashtra, India
[11] Ctr Variable Energy Cyclotron, Kolkata, India
[12] Aligarh Muslim Univ, Dept Phys, Aligarh 202002, Uttar Pradesh, India
[13] COMSATS Inst Informat Technol, Islamabad, Pakistan
[14] Korea Inst Sci & Technol Informat, Taejon, South Korea
[15] Yale Univ, New Haven, CT USA
[16] Inst Theoret & Expt Phys, Moscow 117259, Russia
[17] Russian Res Ctr, Kurchatov Inst, Moscow, Russia
[18] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[19] Ctr Fermi Museo Stor Fis, Rome, Italy
[20] Ctr Studi & Ric Enrico Fermi, Rome, Italy
[21] Bogolyubov Inst Theoret Phys, Kiev, Ukraine
[22] Bergen Univ Coll, Fac Engn, Bergen, Norway
[23] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60054 Frankfurt, Germany
[24] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[25] St Petersburg State Univ, V Fock Inst Phys, St Petersburg 199034, Russia
[26] Univ Sao Paulo, Sao Paulo, Brazil
[27] Natl Inst Phys & Nucl Engn, Bucharest, Romania
[28] GSI Helmholtzzentrum Schwerionenforschung, Div Res, Darmstadt, Germany
[29] Heidelberg Univ, Inst Phys, Heidelberg, Germany
[30] Univ Munster, Inst Kernphys, D-48149 Munster, Germany
[31] Rudjer Boskovic Inst, Zagreb, Croatia
[32] Sezione Ist Nazl Fis Nucl, Padua, Italy
[33] Univ Nantes, Ecole Mines Nantes, SUBATECH, CNRS IN2P3, Nantes, France
[34] Goethe Univ Frankfurt, Inst Kernphys, Frankfurt, Germany
[35] Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela, Spain
[36] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain
[37] Univ Oslo, Dept Phys, Oslo, Norway
[38] Oak Ridge Natl Lab, Oak Ridge, TN USA
[39] Univ Cape Town, Dept Phys, ZA-7925 Cape Town, South Africa
[40] Sezione Ist Nazl Fis Nucl, Catania, Italy
[41] Gangneung Wonju Natl Univ, Kangnung, South Korea
[42] Univ Clermont Ferrand 2, Univ Blaise Pascal, Phys Corpusculaire Lab, CNRS IN2P3, Clermont Ferrand, France
[43] Univ Jammu, Dept Phys, Jammu 180004, India
[44] IRFU, Commissariat Energie Atom, Saclay, France
[45] Inst Phys, Bhubaneswar 751007, Orissa, India
[46] Univ Catania, Dipartimento Fis & Astron, Catania, Italy
[47] Dipartimento Interateneo Fis M Merlin, Bari, Italy
[48] Sezione Ist Nazl Fis Nucl, Bari, Italy
[49] Hungarian Acad Sci, Wigner Res Ctr Phys, Budapest, Hungary
[50] Polish Acad Sci, Niewodniczanski Inst Nucl Phys, Krakow, Poland
基金
瑞典研究理事会; 美国国家科学基金会; 芬兰科学院; 欧洲研究理事会; 新加坡国家研究基金会; 美国能源部; 俄罗斯基础研究基金会; 英国科学技术设施理事会; 中国国家自然科学基金; 巴西圣保罗研究基金会;
关键词
QUARK-GLUON PLASMA; ANGULAR-CORRELATIONS; TRANSVERSE-MOMENTUM; LONG-RANGE; FLOW; PPB; ECCENTRICITIES; MULTIPLICITY; PERSPECTIVE; DEPENDENCE;
D O I
10.1103/PhysRevC.90.054901
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
Measurements of multiparticle azimuthal correlations (cumulants) for charged particles in p-Pb at root s(NN) = 5.02 TeV and Pb-Pb at root s(NN) = 2.76 TeV collisions are presented. They help address the question of whether there is evidence for global, flowlike, azimuthal correlations in the p-Pb system. Comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a vertical bar Delta eta vertical bar gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high multiplicity, indicating the presence of global azimuthal correlations. The Pb-Pb values are higher than the p-Pb values at similar multiplicities. In both systems, the second harmonic four-particle cumulants exhibit a transition from positive to negative values when the multiplicity increases. The negative values allow for a measurement of v(2){4} to be made, which is found to be higher in Pb-Pb collisions at similar multiplicities. The second harmonic six-particle cumulants are also found to be higher in Pb-Pb collisions. In Pb-Pb collisions, we generally find v(2){4} similar or equal to v(2){6} not equal 0 which is indicative of a Bessel-Gaussian function for the v(2) distribution. For very high-multiplicity Pb-Pb collisions, we observe that the four-and six-particle cumulants become consistent with 0. Finally, third harmonic two-particle cumulants in p-Pb and Pb-Pb are measured. These are found to be similar for overlapping multiplicities, when a vertical bar Delta eta vertical bar > 1.4 gap is placed.
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页数:16
相关论文
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