Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at √sNN=2.76 TeV

被引：141

作者：

Abbas, E. ^{[1
]}

Abelev, B. ^{[87
]}

Adam, J. ^{[52
]}

Adamova, D. ^{[94
]}

Adare, A. M. ^{[143
]}

Aggarwal, M. M. ^{[98
]}

Rinella, G. Aglieri ^{[48
]}

Agnello, M. ^{[116
]}

Agocs, A. G. ^{[142
]}

Agostinelli, A. ^{[32
,37
,38
]}

Ahammed, Z. ^{[137
]}

Masoodi, A. Ahmad ^{[22
]}

Ahmad, N. ^{[22
]}

Ahn, S. U. ^{[80
]}

Ahn, S. A. ^{[80
]}

Aimo, I. ^{[31
,32
,116
]}

Ajaz, M. ^{[19
]}

Akindinov, A. ^{[66
]}

Aleksandrov, D. ^{[111
]}

Alessandro, B. ^{[116
]}

Alici, A. ^{[15
,16
,118
]}

Alkin, A. ^{[4
]}

Almaraz Avina, E. ^{[76
]}

Alme, J. ^{[50
]}

Alt, T. ^{[54
]}

Altini, V. ^{[45
,46
]}

Altinpinar, S. ^{[23
]}

Altsybeev, I. ^{[139
]}

Andrei, C. ^{[90
]}

Andronic, A. ^{[107
,108
]}

Anguelov, V. ^{[104
]}

Anielski, J. ^{[74
]}

Anson, C. ^{[24
]}

Anticic, T. ^{[109
]}

Antinori, F. ^{[117
]}

Antonioli, P. ^{[118
]}

Aphecetche, L. ^{[123
]}

Appelshaeuser, H. ^{[72
]}

Arbor, N. ^{[83
]}

Arcelli, S. ^{[37
,38
]}

Arend, A. ^{[72
]}

Armesto, N. ^{[20
,21
]}

Arnaldi, R. ^{[116
]}

Aronsson, T. ^{[143
]}

Arsene, I. C. ^{[107
,108
]}

Arslandok, M. ^{[72
]}

Asryan, A. ^{[139
]}

Augustinus, A. ^{[48
]}

Averbeck, R. ^{[107
,108
]}

Awes, T. C. ^{[95
]}

机构：

[1] ASRT, Cairo, Egypt

[2] Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia

[3] Benemerita Univ Autonoma Puebla, Puebla, Mexico

[4] Bogolyubov Inst Theoret Phys, Kiev, Ukraine

[5] Bose Inst, Dept Phys, Kolkata, India

[6] CAPSS, Kolkata, India

[7] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[8] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA

[9] Cent China Normal Univ, Wuhan, Peoples R China

[10] IN2P3, Ctr Calcul, Villeurbanne, France

[11] CEADEN, Havana, Cuba

[12] CIEMAT, E-28040 Madrid, Spain

[13] CINVESTAV, Mexico City 14000, DF, Mexico

[14] CINVESTAV, Merida, Mexico

[15] Museo Stor Fis, Ctr Fermi, Rome, Italy

[16] Ctr Studi & Ric Enrico Fermi, Rome, Italy

[17] Chicago State Univ, Chicago, IL USA

[18] CEA, IRFU, Saclay, France

[19] CIIT Ctr Hlth Res, Islamabad, Pakistan

[20] Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela, Spain

[21] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain

[22] Aligarh Muslim Univ, Dept Phys, Aligarh 202002, Uttar Pradesh, India

[23] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[24] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[25] Sejong Univ, Dept Phys, Seoul, South Korea

[26] Univ Oslo, Dept Phys, Oslo, Norway

[27] Univ Trieste, Dipartimento Fis, Trieste, Italy

[28] Sezione Ist Nazl Fis Nucl, Trieste, Italy

[29] Univ Cagliari, Dipartimento Fis, Cagliari, Italy

[30] Sezione Ist Nazl Fis Nucl, Cagliari, Italy

[31] Univ Turin, Dipartimento Fis, Turin, Italy

[32] Sezione Ist Nazl Fis Nucl, Turin, Italy

[33] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[34] Sezione Ist Nazl Fis Nucl, Rome, Italy

[35] Univ Catania, Dipartimento Fis & Astron, Catania, Italy

[36] Sezione Ist Nazl Fis Nucl, Catania, Italy

[37] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy

[38] Sezione Ist Nazl Fis Nucl, Bologna, Italy

[39] Univ Padua, Dipartimento Fis & Astron, Padua, Italy

[40] Sezione Ist Nazl Fis Nucl, Padua, Italy

[41] Univ Salerno, Dipartimento Fis ER Caianiello, I-84100 Salerno, Italy

[42] Grp Collegato INFN, Salerno, Italy

[43] Univ Piemonte Orientate, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy

[44] Grp Collegato INFN, Alessandria, Italy

[45] Dipartimento Interateneo Fis M Merlin, Bari, Italy

[46] Sezione Ist Nazl Fis Nucl, Bari, Italy

[47] Lund Univ, Div Expt High Energy Phys, Lund, Sweden

[48] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland

[49] Fachhsch Koln, Cologne, Germany

[50] Bergen Univ Coll, Fac Engn, Bergen, Norway

来源：

PHYSICS LETTERS B | 2013年 / 726卷 / 4-5期

基金：

美国国家科学基金会; 新加坡国家研究基金会; 中国国家自然科学基金; 英国科学技术设施理事会; 欧洲研究理事会; 美国能源部; 瑞典研究理事会; 芬兰科学院; 巴西圣保罗研究基金会; 俄罗斯基础研究基金会;

关键词：

LHC; Heavy-ion collisions; Charged-particle density; Wide rapidity coverage; HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; PLUS AU COLLISIONS; AU+AU COLLISIONS; ART; MODEL; MULTIPLICITY; PERSPECTIVE; ENERGY; PION;

D O I：

10.1016/j.physletb.2013.09.022

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first wide-range measurement of the charged-particle pseudorapidity density distribution, for different centralities (the 0-5%, 5-10%, 10-20%, and 20-30% most central events) in Pb-Pb collisions at root s(NN) = 2.76 TeV at the LHC. The measurement is performed using the full coverage of the ALICE detectors, -5.0 < eta < 5.5, and employing a special analysis technique based on collisions arising from LHC 'satellite' bunches. We present the pseudorapidity density as a function of the number of participating nucleons as well as an extrapolation to the total number of produced charged particles (N-ch = 17165 +/- 772 for the 0-5% most central collisions). From the measured dN(ch)/d eta distribution we derive the rapidity density distribution, dN(ch)/dy, under simple assumptions. The rapidity density distribution is found to be significantly wider than the predictions of the Landau model. We assess the validity of longitudinal scaling by comparing to lower energy results from RHIC. Finally the mechanisms of the underlying particle production are discussed based on a comparison with various theoretical models. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：610 / 622

页数：13

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