Measurement of jet radial profiles in Pb-Pb collisions at √sNN=2.76 TeV

被引:12
作者
Acharya, S. [155 ]
Adamova, D. [106 ]
Adhya, S. P. [155 ]
Adler, A. [87 ]
Adolfsson, J. [93 ]
Aggarwal, M. M. [111 ]
Rinella, G. Aglieri [47 ]
Agnello, M. [33 ,42 ]
Agrawal, N. [12 ,13 ]
Ahammed, Z. [155 ]
Ahmad, S. [20 ]
Ahn, S. U. [89 ]
Aiola, S. [160 ]
Akindinov, A. [77 ]
Al-Turany, M. [118 ,119 ]
Alam, S. N. [155 ]
Albuquerque, D. S. D. [136 ]
Aleksandrov, D. [100 ]
Alessandro, B. [71 ]
Alfanda, H. M. [7 ]
Alfaro Molina, R. [85 ]
Ali, B. [20 ]
Ali, Y. [18 ]
Alici, A. [12 ,13 ,34 ,35 ,66 ]
Alkin, A. [2 ]
Alme, J. [25 ]
Alt, T. [82 ]
Altenkamper, L. [25 ]
Altsybeev, I [126 ]
Anaam, M. N. [7 ]
Andrei, C. [60 ]
Andreou, D. [47 ]
Andrews, H. A. [123 ]
Andronic, A. [158 ]
Angeletti, M. [47 ]
Anguelov, V [115 ]
Anson, C. [19 ]
Anticic, T. [120 ]
Antinori, F. [69 ]
Antonioli, P. [66 ]
Anwar, R. [140 ]
Apadula, N. [92 ]
Aphecetche, L. [128 ]
Appelshaeuser, H. [82 ]
Arcelli, S. [34 ,35 ]
Arnaldi, R. [71 ]
Arratia, M. [92 ]
Arsene, I. C. [24 ]
Arslandok, M. [115 ]
Augustinus, A. [47 ]
机构
[1] Yerevan Phys Inst, AI Alikhanyan Natl Sci Lab Fdn, Yerevan, Armenia
[2] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine
[3] Bose Inst, Dept Phys, Kolkata, India
[4] CAPSS, Kolkata, India
[5] Budker Inst Nucl Phys, Novosibirsk, Russia
[6] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA
[7] Cent China Normal Univ, Wuhan, Hubei, Peoples R China
[8] IN2P3, Ctr Calcul, Lyon, France
[9] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba
[10] CINVESTAV, Ctr Invest & Estudios Avanzados, Mexico City, DF, Mexico
[11] CINVESTAV, Ctr Invest & Estudios Avanzados, Merida, Mexico
[12] Museo Stor Fis, Ctr Fermi, Rome, Italy
[13] Ctr Studi & Ric Enrico Fermi, Rome, Italy
[14] Chicago State Univ, Chicago, IL USA
[15] China Inst Atom Energy, Beijing, Peoples R China
[16] Chonbuk Natl Univ, Jeonju, South Korea
[17] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia
[18] COMSATS Univ Islamabad, Islamabad, Pakistan
[19] Creighton Univ, Omaha, NE 68178 USA
[20] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India
[21] Pusan Natl Univ, Dept Phys, Pusan, South Korea
[22] Sejong Univ, Dept Phys, Seoul, South Korea
[23] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[24] Univ Oslo, Dept Phys, Oslo, Norway
[25] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[26] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy
[27] Sezione Ist Nazl Fis Nucl, Rome, Italy
[28] Univ Cagliari, Dipartimento Fis, Cagliari, Italy
[29] Sezione Ist Nazl Fis Nucl, Cagliari, Italy
[30] Univ Trieste, Dipartimento Fis, Trieste, Italy
[31] Sezione Ist Nazl Fis Nucl, Trieste, Italy
[32] Univ Turin, Dipartimento Fis, Turin, Italy
[33] Sezione Ist Nazl Fis Nucl, Turin, Italy
[34] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[35] Sezione Ist Nazl Fis Nucl, Bologna, Italy
[36] Univ Catania, Dipartimento Fis & Astron, Catania, Italy
[37] Sezione Ist Nazl Fis Nucl, Catania, Italy
[38] Univ Padua, Dipartimento Fis & Astron, Padua, Italy
[39] Sezione Ist Nazl Fis Nucl, Padua, Italy
[40] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy
[41] Grp Collegato INFN, Salerno, Italy
[42] Politecn Torino, Dipartimento DISAT, Turin, Italy
[43] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy
[44] INFN, Sez Torino, Alessandria, Italy
[45] Dipartimento Interateneo Fis M Merlin, Bari, Italy
[46] Sezione Ist Nazl Fis Nucl, Bari, Italy
[47] CERN, European Org Nucl Res, Geneva, Switzerland
[48] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[49] Western Norway Univ Appl Sci, Fac Engn & Sci, Bergen, Norway
[50] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic
基金
俄罗斯基础研究基金会; 新加坡国家研究基金会; 瑞典研究理事会; 俄罗斯科学基金会; 美国国家科学基金会; 奥地利科学基金会; 英国科学技术设施理事会; 巴西圣保罗研究基金会; 中国国家自然科学基金; 日本学术振兴会;
关键词
LARGE TRANSVERSE-MOMENTUM; CHARGED-PARTICLE PRODUCTION; LEAD-LEAD COLLISIONS; QUARK-GLUON PLASMA; PLUS AU COLLISIONS; CENTRALITY DEPENDENCE; ROOT-S-NN=2.76 TEV; SUPPRESSION; PSEUDORAPIDITY; PERSPECTIVE;
D O I
10.1016/j.physletb.2019.07.020
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The jet radial structure and particle transverse momentum (p(T)) composition within jets are presented in centrality-selected Pb-Pb collisions at root s(NN) = 2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R = 0.3 at midrapidity vertical bar eta(chjet)vertical bar < 0.6 for transverse momenta P-T,P- (ch jet) = 30-120 GeV/c. Jet-hadron correlations in relative azimuth and pseudorapidity space (Delta phi/Delta eta) are measured to study the distribution of the associated particles around the jet axis for different p(T, assoc)-ranges between 1 and 20 GeV/c. The data in Pb-Pb collisions are compared to reference distributions for pp collisions, obtained using embedded PYTHIA simulations. The number of high-p(T) associate particles (4 < p(T,assoc) < 20 GeV/c) in Pb-Pb collisions is found to be suppressed compared to the reference by 30 to 10%, depending on centrality. The radial particle distribution relative to the jet axis shows a moderate modification in Pb-Pb collisions with respect to PYTHIA. High-p(T) associate particles are slightly more collimated in Pb-Pb collisions compared to the reference, while low-p(T) associate particles tend to be broadened. The results, which are presented for the first time down to p(T, chjet) = 30 GeV/c in Pb-Pb collisions, are compatible with both previous jet-hadron-related measurements from the CMS Collaboration and jet shape measurements from the ALICE Collaboration at higher p(T), and add further support for the established picture of in-medium parton energy loss. (C) 2019 The Author(s). Published by Elsevier B.V.
引用
收藏
页码:204 / 219
页数:16
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