Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at √sNN=2.76 TeV with the ATLAS Detector at the LHC

被引：864

作者：

Aad, G. ^{[1
]}

Abbott, B. ^{[138
]}

Abdallah, J. ^{[16
]}

Abdelalim, A. A. ^{[67
]}

Abdesselam, A. ^{[145
]}

Abdinov, O. ^{[15
]}

Abi, B. ^{[139
]}

Abolins, M. ^{[112
]}

Abramowicz, H. ^{[193
]}

Abreu, H. ^{[142
]}

Acerbi, E. ^{[113
,114
]}

Acharya, B. S. ^{[206
,207
]}

Ackers, M. ^{[31
]}

Adams, D. L. ^{[35
]}

Addy, T. N. ^{[77
]}

Adelman, J. ^{[221
]}

Aderholz, M. ^{[124
]}

Adomeit, S. ^{[123
]}

Adragna, P. ^{[99
]}

Adye, T. ^{[160
]}

Aefsky, S. ^{[33
]}

Aguilar-Saavedra, J. A. ^{[154
,155
]}

Aharrouche, M. ^{[105
]}

Ahlen, S. P. ^{[32
]}

Ahles, F. ^{[1
]}

Ahmad, A. ^{[188
]}

Ahsan, M. ^{[58
]}

Aielli, G. ^{[165
,166
]}

Akdogan, T. ^{[25
]}

Akesson, T. P. A. ^{[103
]}

Akimoto, G. ^{[195
]}

Akimov, A. V. ^{[119
]}

Alam, M. S. ^{[2
]}

Alam, M. A. ^{[100
]}

Albrand, S. ^{[75
]}

Aleksa, M. ^{[42
]}

Aleksandrov, I. N. ^{[88
]}

Aleppo, M. ^{[113
,114
]}

Alessandria, F. ^{[113
,114
]}

Alexa, C. ^{[36
]}

Alexander, G. ^{[193
]}

Alexandre, G. ^{[67
]}

Alexopoulos, T. ^{[14
]}

Alhroob, M. ^{[31
]}

Aliev, M. ^{[22
]}

Alimonti, G. ^{[113
]}

Alison, J. ^{[148
]}

Aliyev, M. ^{[15
]}

Allport, P. P. ^{[97
]}

Allwood-Spiers, S. E. ^{[73
]}

机构：

[1] Univ Freiburg, Fak Math & Phys, Hermann Herder Str 3, D-79104 Freiburg, Germany

[2] SUNY Albany, Albany, NY 12222 USA

[3] Univ Alberta, Dept Phys, Ctr Particle Phys, Edmonton, AB T6G 2G7, Canada

[4] Ankara Univ, Fac Sci, Dept Phys, TR-061000 Ankara, Turkey

[5] Dumlupinar Univ, Fac Arts & Sci, Dept Phys, Kutahya, Turkey

[6] Gazi Univ, Fac Arts & Sci, Dept Phys, TR-06500 Ankara, Turkey

[7] TOBB Univ Econ & Technol, Fac Arts & Sci, Div Phys, TR-06560 Ankara, Turkey

[8] Turkish Atom Energy Commiss, TR-06530 Ankara, Turkey

[9] Univ Savoie, LAPP, CNRS, IN2P3, Annecy Le Vieux, France

[10] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA

[11] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[12] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

[13] Univ Athens, Dept Phys, GR-15771 Athens, Greece

[14] Natl Tech Univ Athens, Dept Phys, GR-15780 Zografos, Greece

[15] Azerbaijan Acad Sci, Inst Phys, AZ-143 Baku, Azerbaijan

[16] Univ Autonoma Barcelona, IFAE, ES-08193 Bellaterra, Barcelona, Spain

[17] Univ Belgrade, Inst Phys, Belgrade 11001, Serbia

[18] Vinca Inst Nucl Sci, Belgrade 11000, Serbia

[19] Univ Bergen, Dept Phys & Technol, NO-5007 Bergen, Norway

[20] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[21] Univ Calif Berkeley, Div Phys, Berkeley, CA 94720 USA

[22] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[23] Univ Bern, Albert Einstein Ctr Fundamental Phys, High Energy Phys Lab, CH-3012 Bern, Switzerland

[24] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[25] Bogazici Univ, Fac Sci, Dept Phys, TR-80815 Bebek, Turkey

[26] Dogus Univ, Fac Arts & Sci, Dept Phys, TR-34722 Istanbul, Turkey

[27] Gaziantep Univ, Fac Engn, Dept Engn Phys, TR-27310 Sehitkamil, Gaziantep, Turkey

[28] Istanbul Tech Univ, Fac Arts & Sci, Dept Phys, TR-34469 Istanbul, Turkey

[29] Ist Nazl Fis Nucl, Sez Bologna, IT-40127 Bologna, Italy

[30] Univ Bologna, Dipartimento Fis, IT-40127 Bologna, Italy

[31] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[32] Boston Univ, Dept Phys, Boston, MA 02215 USA

[33] Brandeis Univ, Dept Phys, Waltham, MA 02454 USA

[34] Univ Fed Rio de Janeiro, COPPE EE IF, BR-21945970 Rio De Janeiro, Brazil

[35] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[36] Natl Inst Phys & Nucl Engn Bucharest Magurele, R-077125 Bucharest, Romania

[37] Univ Politehn Bucuresti, Bucharest 060042, Romania

[38] W Univ Timisoara, Timisoara, Romania

[39] Univ Buenos Aires, FCEyN, Dept Fis, RA-1428 Buenos Aires, DF, Argentina

[40] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[41] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada

[42] CERN, CH-1211 Geneva 23, Switzerland

[43] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[44] Pontificia Univ Catolica Chile, Fac Fis, Dept Fis, Santiago, Chile

[45] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile

[46] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[47] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[48] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[49] Shandong Univ, High Energy Phys Grp, Jinan 250100, Shandong, Peoples R China

[50] Univ Blaise Pascal, Phys Corpusculaire Lab, Clermont Univ, CNRS,IN2P3, FR-63177 Aubiere, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 25期

基金：

巴西圣保罗研究基金会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.105.252303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in the collisions of lead ions at the Large Hadron Collider. In a sample of lead-lead events with a per-nucleon center of mass energy of 2.76 TeV, selected with a minimum bias trigger, jets are reconstructed in fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies of dijets in opposite hemispheres are observed to become systematically more unbalanced with increasing event centrality leading to a large number of events which contain highly asymmetric dijets. This is the first observation of an enhancement of events with such large dijet asymmetries, not observed in proton-proton collisions, which may point to an interpretation in terms of strong jet energy loss in a hot, dense medium.

引用

页数：18

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