Azimuthal anisotropy of D-meson production in Pb-Pb collisions at √sNN=2.76 TeV

被引：121

作者：

Abelev, B. ^{[1
]}

Adam, J. ^{[2
]}

Adamova, D. ^{[3
]}

Aggarwal, M. M. ^{[4
]}

Agnello, M. ^{[5
,6
]}

Agostinelli, A. ^{[7
,8
]}

Agrawal, N. ^{[9
]}

Ahammed, Z. ^{[10
]}

Ahmad, N. ^{[11
]}

Ahmed, I. ^{[12
]}

Ahn, S. U. ^{[13
]}

Ahn, S. A. ^{[13
]}

Aimo, I. ^{[5
,6
]}

Aiola, S. ^{[14
]}

Ajaz, M. ^{[12
]}

Akindinov, A. ^{[15
]}

Alam, S. N. ^{[10
]}

Aleksandrov, D. ^{[16
]}

Alessandro, B. ^{[5
]}

Alexandre, D. ^{[17
]}

Alici, A. ^{[8
,18
,19
]}

Alkin, A. ^{[20
]}

Alme, J. ^{[21
]}

Alt, T. ^{[22
]}

Altinpinar, S. ^{[23
]}

Altsybeev, I. ^{[24
]}

Prado, C. Alves Garcia ^{[25
]}

Andrei, C. ^{[26
]}

Andronic, A. ^{[27
,28
]}

Anguelov, V. ^{[29
]}

Anielski, J. ^{[30
]}

Anticic, T. ^{[31
]}

Antinori, F. ^{[32
]}

Antonioli, P. ^{[8
]}

Aphecetche, L. ^{[33
]}

Appelshaeuser, H. ^{[34
]}

Arcelli, S. ^{[7
,8
]}

Armesto, N. ^{[35
,36
]}

Arnaldi, R. ^{[5
]}

Aronsson, T. ^{[14
]}

Arsene, I. C. ^{[27
,28
]}

Arslandok, M. ^{[34
]}

Augustinus, A. ^{[37
]}

Averbeck, R. ^{[27
,28
]}

Awes, T. C. ^{[38
]}

Azmi, M. D. ^{[39
]}

Bach, M. ^{[22
]}

Badala, A. ^{[40
,41
]}

Baek, Y. W. ^{[42
,43
]}

Bagnasco, S. ^{[5
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-16635 Prague, Czech Republic

[3] Acad Sci Czech Republ, Inst Nucl Phys, Prague, Czech Republic

[4] Panjab Univ, Dept Phys, Chandigarh 160014, India

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

[6] Politecn Torino, Turin, Italy

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

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

[9] Indian Inst Technol Bombay IIT, Mumbai, Maharashtra, India

[10] Ctr Variable Energy Cyclotron, Kolkata, India

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

[12] CIIT Ctr Hlth Res, Islamabad, Pakistan

[13] Korea Inst Sci & Technol Informat, Taejon, South Korea

[14] Yale Univ, New Haven, CT USA

[15] Inst Theoret & Expt Phys, Moscow 117259, Russia

[16] Russian Res Ctr, Kurchatov Inst, Moscow, Russia

[17] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England

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

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

[20] Bogolyubov Inst Theoret Phys, Kiev, Ukraine

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

[22] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60054 Frankfurt, Germany

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

[24] St Petersburg State Univ, V Fock Inst Phys, St Petersburg 199034, Russia

[25] Univ Sao Paulo, BR-09500900 Sao Paulo, Brazil

[26] Natl Inst Phys & Nucl Engn, Bucharest, Romania

[27] GSI Helmholtzzentrum Schwerionenforsch, Div Res, D-64291 Darmstadt, Germany

[28] GSI Helmholtzzentrum Schwerionenforsch, ExtreMe Matter Inst EMMI, D-64291 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, CNRS IN2P3, Ecole Mines Nantes, SUBATECH, Nantes, France

[34] Goethe Univ Frankfurt, Inst Kernphys, D-60054 Frankfurt, Germany

[35] Univ Santiago Compostela, Dept Fis Particulas, Santiago De Compostela, Spain

[36] Univ Santiago Compostela, IGFAE, Santiago De Compostela, Spain

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

[38] Oak Ridge Natl Lab, Oak Ridge, TN USA

[39] Univ Cape Town, Dept Phys, ZA-7925 Cape Town, South Africa

[40] Univ Cape Town, Dept Phys, ZA-7925 Cape Town, South Africa

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

[42] Univ Blaise Pascal, Clermont Univ, CNRS IN2P3, LPC, Clermont Ferrand, France

[43] Gangneung Wonju Natl Univ, Kangnung, South Korea

[44] Univ Jammu, Dept Phys, Jammu 180004, India

[45] IRFU, Commissariat Energie Atom, Saclay, France

[46] Inst Phys, Bhubaneswar 751007, Orissa, India

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

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

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

[50] Hungarian Acad Sci, Wigner Res Ctr Phys, Budapest, Hungary

来源：

PHYSICAL REVIEW C | 2014年 / 90卷 / 03期

基金：

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

关键词：

RADIATIVE ENERGY-LOSS; JET PRODUCTION; HEAVY-FLAVOR; FLOW; CHARM; SPS;

D O I：

10.1103/PhysRevC.90.034904

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：

The production of the prompt charmed mesonsD(0), D+, andD(*+) relative to the reaction plane was measured in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision of root s(NN) = 2.76 TeV with the ALICE detector at the CERN Large Hadron Collider. D mesons were reconstructed via their hadronic decays at central rapidity in the transverse-momentum (pT) interval 2-16 GeV/c. The azimuthal anisotropy is quantified in terms of the second coefficient v(2) in a Fourier expansion of the D-meson azimuthal distribution and in terms of the nuclear modification factor R-AA, measured in the direction of the reaction plane and orthogonal to it. The v(2) coefficient was measured with three different methods and in three centrality classes in the interval 0%-50%. A positive v(2) is observed in midcentral collisions (30%-50% centrality class), with a mean value of 0.204(-0.036)(+0.099) (tot.unc.) in the interval 2 < pT < 6 GeV/c, which decreases towards more central collisions (10%-30% and 0%-10% classes). The positive v(2) is also reflected in the nuclear modification factor, which shows a stronger suppression in the direction orthogonal to the reaction plane formidcentral collisions. The measurements are compared to theoretical calculations of charm-quark transport and energy loss in high-density strongly interacting matter at high temperature. The models that include substantial elastic interactions with an expanding medium provide a good description of the observed anisotropy. However, they are challenged to simultaneously describe the strong suppression of high-pT yield of D mesons in central collisions and their azimuthal anisotropy in noncentral collisions.

引用

页数：25

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