Measurement of angular and momentum distributions of charged particles within and around jets in Pb plus Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector

被引:16
作者
Aad, G. [159 ]
Abbott, B. [190 ]
Abbott, D. C. [160 ]
Abud, A. Abed [114 ,115 ]
Abeling, K. [82 ]
Abhayasinghe, D. K. [150 ]
Abidi, S. H. [237 ]
AbouZeid, O. S. [65 ]
Abraham, N. L. [224 ]
Abramowicz, H. [230 ]
Abreu, H. [229 ]
Abulaiti, Y. [8 ]
Acharya, B. S. [105 ,106 ,267 ]
Achkar, B. [82 ]
Adachi, S. [232 ,233 ]
Adam, L. [157 ]
Bourdarios, C. Adam [7 ]
Adamczyk, L. [136 ]
Adamek, L. [237 ]
Adelman, J. [181 ]
Adersberger, M. [172 ]
Adiguzel, A. [16 ]
Adorni, S. [83 ]
Adye, T. [211 ]
Affolder, A. A. [213 ]
Afik, Y. [229 ]
Agapopoulou, C. [194 ]
Agaras, M. N. [63 ]
Aggarwal, A. [178 ]
Agheorghiesei, C. [42 ]
Aguilar-Saavedra, J. A. [202 ,207 ,281 ]
Ahmadov, F. [129 ]
Ahmed, W. S. [161 ]
Ai, X. [26 ,27 ]
Aielli, G. [120 ,121 ]
Akatsuka, S. [139 ]
Akesson, T. P. A. [153 ]
Akilli, E. [83 ]
Akimov, A., V [168 ]
Al Khoury, K. [194 ]
Alberghi, G. L. [34 ,35 ,36 ]
Albert, J. [248 ]
Verzini, M. J. Alconada [230 ]
Alderweireldt, S. [61 ]
Aleksa, M. [61 ]
Aleksandrov, I. N. [129 ]
Alexa, C. [41 ]
Alexandre, D. [28 ]
Alexopoulos, T. [12 ]
Alfonsi, A. [179 ,180 ]
机构
[1] Univ Adelaide, Dept Phys, Adelaide, SA, Australia
[2] SUNY Albany, Dept Phys, Albany, NY 12222 USA
[3] Univ Alberta, Dept Phys, Edmonton, AB, Canada
[4] Ankara Univ, Dept Phys, Ankara, Turkey
[5] Istanbul Aydin Univ, Istanbul, Turkey
[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey
[7] Univ Grenoble Alpes, Univ Savoie Mt Blanc, IN2P3, CNRS, Annecy, France
[8] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA
[9] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[10] Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA
[11] Univ Athens, Phys Dept, Athens, Greece
[12] Natl Tech Univ Athens, Phys Dept, Zografos, Greece
[13] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
[14] Bahcesehir Univ, Fac Engn & Nat Sci, Istanbul, Turkey
[15] Istanbul Bilgi Univ, Fac Engn & Nat Sci, Istanbul, Turkey
[16] Bogazici Univ, Dept Phys, Istanbul, Turkey
[17] Gaziantep Univ, Dept Phys Engn, Gaziantep, Turkey
[18] Azerbaijan Acad Sci, Inst Phys, Baku, Azerbaijan
[19] Barcelona Inst Sci & Technol, IFAE, Barcelona, Spain
[20] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[21] Tsinghua Univ, Phys Dept, Beijing, Peoples R China
[22] Nanjing Univ, Dept Phys, Nanjing, Jiangsu, Peoples R China
[23] Univ Chinese Acad Sci, Beijing, Peoples R China
[24] Univ Belgrade, Inst Phys, Belgrade, Serbia
[25] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[26] Lawrence Berkeley Natl Lab, Phys Div, Berkeley, CA USA
[27] Univ Calif Berkeley, Berkeley, CA 94720 USA
[28] Humboldt Univ, Inst Phys, Berlin, Germany
[29] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland
[30] Univ Bern, Lab High Energy Phys, Bern, Switzerland
[31] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[32] Univ Antonio Narino, Fac Ciencias, Bogota, Colombia
[33] Univ Antonio Narino, Ctr Invest, Bogota, Colombia
[34] INFN Bologna, Bologna, Italy
[35] Univ Bologna, Dipartimento Fis, Bologna, Italy
[36] INFN, Sez Bologna, Bologna, Italy
[37] Univ Bonn, Phys Inst, Bonn, Germany
[38] Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
[39] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA
[40] Transilvania Univ Brasov, Brasov, Romania
[41] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania
[42] Alexandru Ioan Cuza Univ, Dept Phys, Iasi, Romania
[43] Natl Inst Res & Dev Isotop & Mol Technol, Phys Dept, Cluj Napoca, Romania
[44] West Univ Timisoara, Timisoara, Romania
[45] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia
[46] Slovak Acad Sci, Dept Subnucl Phys, Inst Expt Phys, Kosice, Slovakia
[47] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[48] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[49] Calif State Univ, Long Beach, CA USA
[50] Univ Cambridge, Cavendish Lab, Cambridge, England
基金
加拿大自然科学与工程研究理事会; 欧盟地平线“2020”; 巴西圣保罗研究基金会;
关键词
HEAVY-ION COLLISIONS; FRAGMENTATION; MODEL;
D O I
10.1103/PhysRevC.100.064901
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
Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in root s(NN) = 5.02 TeV Pb + Pb and pp collisions, using the ATLAS detector at the LHC. The Pb + Pb and pp data sets have integrated luminosities of 0.49 nb(-1) and 25 pb(-1), respectively. The measurement is performed for jets reconstructed with the anti-k(t) algorithm with radius parameter R = 0.4 and is extended to an angular distance of r = 0.8 from the jet axis. Results are presented as a function of Pb + Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1- to 63-GeV range, matched to jets with transverse momenta in the 126- to 316-GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r = 0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb + Pb collisions in the jet core for angular distances up to r = 0.05 from the jet axis, with a suppression at larger distances.
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页数:29
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