Suppression of Λ(1520) resonance production in central Pb-Pb collisions at √SNN=2.76 TeV

被引:39
作者
Acharya, S. [153 ]
Adamova, D. [108 ]
Adolfsson, J. [95 ]
Aggarwal, M. M. [112 ]
Rinella, G. Aglieri [50 ]
Agnello, M. [45 ]
Agrawal, N. [63 ]
Ahammed, Z. [153 ]
Ahn, S. U. [91 ]
Aiola, S. [158 ]
Akindinov, A. [79 ]
Al-Turany, M. [118 ,119 ]
Alam, S. N. [153 ]
Albuquerque, D. S. D. [135 ]
Aleksandrov, D. [102 ]
Alessandro, B. [73 ]
Alfaro Molina, R. [87 ]
Ali, Y. [20 ]
Alici, A. [14 ,15 ,37 ,38 ,68 ]
Alkin, A. [3 ]
Alme, J. [28 ]
Alt, T. [84 ]
Altenkamper, L. [28 ]
Altsybeev, I [152 ]
Anaam, M. N. [8 ]
Andrei, C. [62 ]
Andreou, D. [50 ]
Andrews, H. A. [123 ]
Andronic, A. [118 ,119 ,156 ]
Angeletti, M. [50 ]
Anguelov, V [116 ]
Anson, C. [21 ]
Anticic, T. [120 ]
Antinori, F. [71 ]
Antonioli, P. [68 ]
Anwar, R. [139 ]
Apadula, N. [94 ]
Aphecetche, L. [127 ]
Appelshaeuser, H. [84 ]
Arcelli, S. [37 ,38 ]
Arnaldi, R. [73 ]
Arnold, O. W. [117 ,130 ]
Arsene, I. C. [27 ]
Arslandok, M. [116 ]
Audurier, B. [127 ]
Augustinus, A. [50 ]
Averbeck, R. [118 ,119 ]
Azmi, M. D. [22 ]
Badala, A. [70 ]
Baek, Y. W. [56 ,75 ]
机构
[1] Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia
[2] Benemerita Univ Autonoma Puebla, Puebla, Mexico
[3] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine
[4] Bose Inst, Dept Phys, Kolkata, India
[5] 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, Hubei, Peoples R China
[9] IN2P3, Ctr Calcul, Lyon, France
[10] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba
[11] Ctr Invest & Estudios Avanzados CINVESTAV, Mexico City, DF, Mexico
[12] Ctr Invest & Estudios Avanzados CINVESTAV, Merida, Mexico
[13] Ctr Invest & Estudios Avanzados CINVESTAV, Merida, Venezuela
[14] Ctr Fermi Museo Stor Fis, Rome, Italy
[15] Ctr Ric Enrico Fermi, Rome, Italy
[16] Chicago State Univ, Chicago, IL USA
[17] China Inst Atom Energy, Beijing, Peoples R China
[18] Chonbuk Natl Univ, Jeonju, South Korea
[19] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia
[20] COMSATS Inst Informat Technol CIIT, Islamabad, Pakistan
[21] Creighton Univ, Omaha, NE 68178 USA
[22] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India
[23] Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA
[24] Pusan Natl Univ, Dept Phys, Pusan, South Korea
[25] Sejong Univ, Dept Phys, Seoul, South Korea
[26] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[27] Univ Oslo, Dept Phys, Oslo, Norway
[28] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[29] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy
[30] Sezione Ist Nazl Fis Nucl, Rome, Italy
[31] Univ Cagliari, Dipartimento Fis, Cagliari, Italy
[32] Sezione Ist Nazl Fis Nucl, Cagliari, Italy
[33] Univ Trieste, Dipartimento Fis, Trieste, Italy
[34] Sezione Ist Nazl Fis Nucl, Trieste, Italy
[35] Univ Torino, Dipartimento Fis, Turin, Italy
[36] Sezione Ist Nazl Fis Nucl, Turin, Italy
[37] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[38] Sezione Ist Nazl Fis Nucl, Bologna, Italy
[39] Univ Catania, Dipartimento Fis & Astron, Catania, Italy
[40] Sezione Ist Nazl Fis Nucl, Catania, Italy
[41] Univ Padua, Dipartimento Fis & Astron, Padua, Italy
[42] Sezione Ist Nazl Fis Nucl, Padua, Italy
[43] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy
[44] Grp Collegato INFN, Salerno, Italy
[45] Politecn Torino, Dipartimento DISAT, Turin, Italy
[46] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy
[47] INFN, Sez Torino, Alessandria, Italy
[48] Dipartimento Interateneo Fis M Merlin, Bari, Italy
[49] Sezione Ist Nazl Fis Nucl, Bari, Italy
[50] CERN, European Org Nucl Res, Geneva, Switzerland
基金
英国科学技术设施理事会; 瑞典研究理事会; 中国国家自然科学基金; 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; 美国国家科学基金会; 日本学术振兴会;
关键词
FREEZE-OUT; MODEL;
D O I
10.1103/PhysRevC.99.024905
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 yield of the Lambda(1520) baryon resonance is measured at midrapidity in Pb-Pb collisions at root S-NN = 2.76 TeV with the ALICE detector at the Large Hadron Collider (LHC). The measurement is performed in the Lambda(1520) -> pK(-) (and charge conjugate) hadronic decay channel as a function of the transverse momentum (p(T)) and collision centrality. The ratio of the P-T-integrated production of Lambda(1520) baryons relative to A baryons in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at the LHC and the first 3 sigma evidence of Lambda(1520) suppression within a single collision system. The measured Lambda(1520)/Lambda ratio in central collisions is smaller than the value predicted by the statistical hadronization model calculations. The shape of the measured p(T) distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances.
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页数:12
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