Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)0 and φ(1020) mesons

被引:50
作者
Acharya, S. [157 ]
Acosta, F. T. [24 ]
Adam, J. [52 ]
Adamova, D. [108 ]
Adler, A. [89 ]
Adolfsson, J. [95 ]
Aggarwal, M. M. [113 ]
Rinella, G. Aglieri [49 ]
Agnello, M. [43 ,44 ]
Agrawal, N.
Ahammed, Z. [157 ]
Ahn, S. U. [91 ]
Aiola, S. [162 ]
Akindinov, A. [79 ]
Al-Turany, M. [119 ,120 ]
Alam, S. N. [157 ]
Albuquerque, D. S. D. [137 ]
Aleksandrov, D. [102 ]
Alessandro, B. [73 ]
Alfanda, H. M. [7 ]
Alfaro Molina, R. [87 ]
Ali, Y. [19 ]
Alici, A. [13 ,14 ,35 ,36 ,68 ]
Alkin, A. [2 ]
Alme, J. [26 ]
Alt, T. [84 ]
Altenkamper, L. [26 ]
Altsybeev, I. [127 ]
Anaam, M. N. [7 ]
Andrei, C. [62 ]
Andreou, D. [49 ]
Andrews, H. A. [124 ]
Andronic, A. [119 ,120 ,160 ]
Angeletti, M. [49 ]
Anguelov, V. [117 ]
Anson, C. [20 ]
Anticic, T. [121 ]
Antinori, F. [71 ]
Antonioli, P. [68 ]
Anwar, R. [141 ]
Apadula, N. [94 ]
Aphecetche, L. [129 ]
Appelshaeuser, H. [84 ]
Arcelli, S. [35 ,36 ]
Arnaldi, R. [73 ]
Arratia, M. [94 ]
Arsene, I. C. [25 ]
Arslandok, M. [117 ]
Augustinus, A. [49 ]
Averbeck, R. [119 ,120 ]
机构
[1] Yerevan Phys Inst, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia
[2] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine
[3] Bose Inst, Dept Phys, Kolkata, India
[4] Bose Inst, Ctr Astroparticle Phys & Space Sci, Kolkata, India
[5] Budker Inst Nucl Phys, Novosibirsk, Russia
[6] Calif Polytechn State Univ, San Luis Obispo, CA USA
[7] Cent China Normal Univ, Wuhan, Hubei, Peoples R China
[8] Ctr Calcul IN2P3, Villeurbanne, France
[9] Ctr Calcul IN2P3, Lyon, France
[10] Ctr Aplicaciones Tecnolog & Desarrollo Nucl CEADE, Havana, Cuba
[11] Ctr Investigac & Estudios Avanzados CINVESTAV, Mexico City, DF, Mexico
[12] Ctr Investigac & Estudios Avanzados CINVESTAV, Merida, Venezuela
[13] Ctr Fermi Museo Storico Fis, Rome, Italy
[14] Ctr Studi & Ric Enrico Fermi, Rome, Italy
[15] Chicago State Univ, Chicago, IL USA
[16] China Inst Atom Energy, Beijing, Peoples R China
[17] Chonbuk Natl Univ, Jeonju, South Korea
[18] Comenius Univ, Fac Math, Phys & Informat, Bratislava, Slovakia
[19] COMSATS Inst Informat Technol CIIT, Islamabad, Pakistan
[20] Creighton Univ, Omaha, NE 68178 USA
[21] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India
[22] Pusan Natl Univ, Dept Phys, Pusan, South Korea
[23] Sejong Univ, Dept Phys, Seoul, South Korea
[24] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[25] Univ Oslo, Dept Phys, Oslo, Norway
[26] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[27] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy
[28] Sezione Ist Nazl Fis Nucl, Rome, Italy
[29] Univ Cagliari, Dipartimento Fis, Cagliari, Italy
[30] Sezione Ist Nazl Fis Nucl, Cagliari, Italy
[31] Univ Trieste, Dipartimento Fis, Trieste, Italy
[32] Sezione Ist Nazl Fis Nucl, Trieste, Italy
[33] Univ Turin, Dipartimento Fis, Turin, Italy
[34] Sezione Ist Nazl Fis Nucl, Turin, Italy
[35] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[36] Sezione Ist Nazl Fis Nucl, Bologna, Italy
[37] Univ Catania, Dipartimento Fis & Astron, Catania, Italy
[38] Sezione Ist Nazl Fis Nucl, Catania, Italy
[39] Univ Padua, Dipartimento Fis & Astron, Padua, Italy
[40] Sezione Ist Nazl Fis Nucl, Padua, Italy
[41] ER Caianiello Univ Salerno, Dipartimento Fis, Salerno, Italy
[42] Grp Collegato INFN, Salerno, Italy
[43] Politecn Torino, Dipartimento DISAT, Turin, Italy
[44] Sezione Ist Nazl Fis Nucl, Turin, Italy
[45] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy
[46] INFN, Sez Torino, Alessandria, Italy
[47] Dipartimento Interateneo Fis M Merlin, Bari, Italy
[48] Sezione Ist Nazl Fis Nucl, Bari, Italy
[49] European Org Nucl Res CERN, Geneva, Switzerland
[50] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
基金
奥地利科学基金会; 英国科学技术设施理事会; 新加坡国家研究基金会; 巴西圣保罗研究基金会; 瑞典研究理事会; 日本学术振兴会; 中国国家自然科学基金;
关键词
QUARK-GLUON PLASMA; RESONANCE PRODUCTION; FREEZE-OUT; ENERGY; PERSPECTIVE; PHYSICS; MATTER; PIONS; DECAY; PP;
D O I
10.1016/j.physletb.2020.135225
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Measurements of K*(892)(0) and phi(1020) resonance production in Pb-Pb and pp collisions at root s(NN) = 5.02 TeV with the ALICE detector at the Large Hadron Collider are reported. The resonances are measured at midrapidity (vertical bar y vertical bar < 0.5) via their hadronic decay channels and the transverse momentum (p(T)) distributions are obtained for various collision centrality classes up to p(T) = 20 GeV/c. The p(T)-integrated yield ratio K*(892)(0)/K in Pb-Pb collisions shows significant suppression relative to pp collisions and decreases towards more central collisions. In contrast, the phi(1020)/K ratio does not show any suppression. Furthermore, the measured K*(892)(0)/K ratio in central Pb-Pb collisions is significantly suppressed with respect to the expectations based on a thermal model calculation, while the phi(1020)/K ratio agrees with the model prediction. These measurements are an experimental demonstration of rescattering of K*(892)(0) decay products in the hadronic phase of the collisions. The K*(892)(0)/K yield ratios in Pb-Pb and pp collisions are used to estimate the time duration between chemical and kinetic freeze-out, which is found to be similar to 4-7 fm/c for central collisions. The p(T)-differential ratios of K*(892)(0)/K, phi(1020)/K, K*(892)(0)/pi, phi(1020)/pi, p/K*(892)(0) and p/phi(1020) are also presented for Pb-Pb and pp collisions at root s(NN) = 5.02 TeV. These ratios show that the rescattering effect is predominantly a low-p(T) phenomenon. (C) 2020 The Author(s). Published by Elsevier B.V.
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页数:14
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