Azimuthally Differential Pion Femtoscopy in Pb-Pb Collisions at √sNN=2.76 TeV

被引:13
作者
Adamova, D. [49 ,102 ,103 ,152 ]
Aggarwal, M. M. [49 ,107 ,152 ]
Rinella, G. Aglieri [49 ,75 ,113 ]
Agnello, M. [42 ,43 ]
Agrawal, N. [62 ]
Ahammed, Z. [156 ]
Ahmad, S. [21 ,130 ]
Ahn, S. U. [84 ]
Aiola, S. [160 ]
Akindinov, A. [69 ,163 ]
Alam, S. N. [156 ]
Albuquerque, D. S. D. [141 ]
Aleksandrov, D. [98 ]
Alessandro, B. [98 ,130 ]
Alexandre, D. [121 ]
Alfaro Molina, R. [79 ]
Alici, A. [14 ,15 ]
Alkin, A. [3 ]
Alme, J. [25 ]
Alt, T. [56 ,124 ]
Altinpinar, S. [25 ]
Altsybeev, I. [51 ,155 ]
Alves Garcia Prado, C. [140 ]
An, M. [8 ]
Andrei, C. [95 ]
Andrews, H. A. [121 ]
Andronic, A. [116 ,117 ]
Anguelov, V. [112 ]
Anson, C. [106 ]
Anticic, T. [118 ]
Antinori, F. [127 ]
Antonioli, P. [124 ]
Anwar, R. [143 ]
Aphecetche, L. [133 ]
Appelshaeuser, H. [75 ]
Arcelli, S. [34 ,35 ]
Arnaldi, R. [130 ]
Arnold, O. W. [113 ]
Arsene, I. C. [24 ]
Arslandok, M. [75 ]
Audurier, B. [50 ,133 ]
Augustinus, A. [49 ]
Averbeck, R. [116 ,117 ]
Azmi, M. D. [21 ]
Badala, A. [126 ]
Baek, Y. W. [83 ]
Bagnasco, S. [130 ]
Bailhache, R. [75 ]
Bala, R. [109 ]
Baldisseri, A. [80 ]
机构
[1] AI Alikhanyan Natl Sci Lab Yerevan Phys Inst Fdn, Yerevan, Armenia
[2] Benemerita Univ Autonoma Puebla, Puebla, Mexico
[3] Bogolyubov Inst Theoret Phys, Kiev, Ukraine
[4] Bose Inst, Dept Phys, Kolkata, India
[5] Bose Inst, CAPSS, Kolkata, India
[6] Budker Inst Nucl Phys, Novosibirsk, Russia
[7] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA
[8] Cent China Normal Univ, Wuhan, Peoples R China
[9] Ctr Calcul IN2P3, Lyon, France
[10] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba
[11] CIEMAT, Madrid, Spain
[12] Ctr Invest & Estudios Avanzados CINVESTAV, Mexico City, DF, Mexico
[13] Ctr Invest & Estudios Avanzados CINVESTAV, Merida, Mexico
[14] Ctr Fermi Museo Storico Fis, Rome, Italy
[15] Ctr Studi & Ric Enrico Fermi, Rome, Italy
[16] Chicago State Univ, Chicago, IL USA
[17] China Inst Atomic Energy, Beijing, Peoples R China
[18] CIIT Ctr Hlth Res, Islamabad, Pakistan
[19] Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela, Spain
[20] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain
[21] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India
[22] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[23] Sejong Univ, Dept Phys, Seoul, South Korea
[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] Univ Roma La Sapienza, Sez INFN, Rome, Italy
[28] Univ Cagliari, Dipartimento Fis, Cagliari, Italy
[29] Univ Cagliari, Sez INFN, Cagliari, Italy
[30] Univ Trieste, Dipartimento Fis, Trieste, Italy
[31] Univ Trieste, Sez INFN, Trieste, Italy
[32] Univ Turin, Dipartimento Fis, Turin, Italy
[33] Univ Turin, Sez INFN, Turin, Italy
[34] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[35] Univ Bologna, Sez INFN, Bologna, Italy
[36] Univ Catania, Dipartimento Fis & Astron, Catania, Italy
[37] Univ Catania, Sez INFN, Catania, Italy
[38] Univ Padua, Dipartimento Fis & Astron, Padua, Italy
[39] Univ Padua, Sez INFN, Padua, Italy
[40] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy
[41] Univ Salerno, Grp Coll INFN, Salerno, Italy
[42] Politecn Torino, Dipartimento DISAT, Turin, Italy
[43] Politecn Torino, Sez INFN, Turin, Italy
[44] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnolog, Turin, Italy
[45] Univ Piemonte Orientale, Ist Nazl Fis Nucl, Sez Torino, Alessandria, Italy
[46] Dipartimento Interateneo Fis M Merlin, Bari, Italy
[47] Sezione Ist Nazl Fis Nucl, Bari, Italy
[48] Lund Univ, Div Expt High Energy Phys, Lund, Sweden
[49] European Org Nucl Res, CERN, Geneva, Switzerland
[50] Tech Univ Munich, Excellence Cluster Univ, Munich, Germany
基金
瑞典研究理事会; 美国国家科学基金会; 新加坡国家研究基金会; 巴西圣保罗研究基金会; 美国能源部; 英国科学技术设施理事会; 日本学术振兴会; 中国国家自然科学基金;
关键词
HEAVY-ION COLLISIONS; MULTIPLE PRODUCTION; AU+AU COLLISIONS; TRANSVERSE FLOW; INTERFEROMETRY;
D O I
10.1103/PhysRevLett.118.222301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present the first azimuthally differential measurements of the pion source size relative to the second harmonic event plane in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon pair of root(NN)-N-s = 2.76 TeV. The measurements have been performed in the centrality range 0%-50% and for pion pair transverse momenta 0.2 < k(T) < 0.7 GeV/c. We find that the R-side and R-out radii, which characterize the pion source size in the directions perpendicular and parallel to the pion transverse momentum, oscillate out of phase, similar to what was observed at the Relativistic Heavy Ion Collider. The final-state source eccentricity, estimated via R-side oscillations, is found to be significantly smaller than the initial-state source eccentricity, but remains positive-indicating that even after a stronger expansion in the in-plane direction, the pion source at the freeze-out is still elongated in the out-of-plane direction. The 3 + 1D hydrodynamic calculations are in qualitative agreement with observed centrality and transverse momentum R-side oscillations, but systematically underestimate the oscillation magnitude.
引用
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页数:12
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