Multi-strange baryon production in p-Pb collisions at √SNN=5.02 TeV

被引：133

作者：

Adam, J. ^{[53
]}

Adamova, D. ^{[97
,98
]}

Aggarwal, M. M. ^{[102
]}

Rinella, G. Aglieri ^{[49
]}

Agnello, M. ^{[125
]}

Agrawal, N. ^{[61
]}

Ahammed, Z. ^{[147
]}

Ahmad, S. ^{[22
]}

Ahn, S. U. ^{[81
]}

Aiola, S. ^{[151
]}

Akindinov, A. ^{[49
,71
]}

Alam, S. N. ^{[147
]}

Aleksandrov, D. ^{[93
]}

Alessandro, B. ^{[125
]}

Alexandre, D. ^{[116
]}

Molina, R. Alfaro ^{[77
]}

Alici, A. ^{[13
,14
,119
]}

Alkin, A. ^{[3
]}

Almaraz, J. R. M. ^{[134
]}

Alme, J. ^{[51
]}

Alt, T. ^{[56
]}

Altinpinar, S. ^{[21
]}

Altsybeev, I. ^{[146
]}

Prado, C. Alves Garcia ^{[135
]}

Andrei, C. ^{[91
]}

Andronic, A. ^{[111
,112
]}

Anguelov, V. ^{[49
,108
]}

Anielski, J. ^{[67
]}

Anticic, T. ^{[113
]}

Antinori, F. ^{[122
]}

Antonioli, P. ^{[119
]}

Aphecetche, L. ^{[128
]}

Appelshaeuser, H. ^{[66
]}

Arcelli, S. ^{[35
,36
]}

Arnaldi, R. ^{[125
]}

Arnold, O. W. ^{[50
,107
]}

Arsene, I. C. ^{[25
]}

Arslandok, M. ^{[66
]}

Audurier, B. ^{[128
]}

Augustinus, A. ^{[49
]}

Averbeck, R. ^{[111
,112
]}

Azmi, M. D. ^{[22
]}

Badala, A. ^{[121
]}

Baek, Y. W. ^{[80
]}

Bagnasco, S. ^{[125
]}

Bailhache, R. ^{[66
]}

Bala, R. ^{[105
]}

Balasubramanian, S. ^{[151
]}

Baldisseri, A. ^{[17
]}

Baral, R. C. ^{[74
]}

机构：

[1] Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia

[2] Benemerita Univ Autonoma Puebla, Puebla, Mexico

[3] Bogolyubov Inst Theoret Phys, Kiev, Ukraine

[4] Bose Inst, Dept Phys, Kolkata, India

[5] CAPSS, Kolkata, India

[6] Budker Inst Nucl Phys, Novosibirsk 630090, 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, Villeurbanne, France

[10] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba

[11] Ctr Invest Energet Medioambientales & Tecnol CIEM, Madrid, Spain

[12] Ctr Invest Estudios Avanzados CINVESTAV, Mexico City, DF, Mexico

[13] Museo Storico Fis, Ctr Fermi, 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] IRFU, Commissariat Energie Atom, Saclay, France

[18] COMSATS Inst Informat Technol CIIT, 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] Univ Bergen, Dept Phys & Technol, Bergen, Norway

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

[23] Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA

[24] Sejong Univ, Dept Phys, Seoul, South Korea

[25] Univ Oslo, Dept Phys, Oslo, Norway

[26] Dipartimento Elettrotecn Elettron Politecn, Bari, Italy

[27] Univ Roma La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 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] Univ Salerno, Dipartimento Fis ER Caianiello, I-84100 Salerno, Italy

[42] Grp Collegato INFN, I-84100 Salerno, Italy

[43] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy

[44] Grp Collegato INFN, Alessandria, Italy

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

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

[47] Lund Univ, Div Expt High Energy Phys, Lund, Sweden

[48] Univ Tubingen, Tubingen, Germany

[49] European Org Nucl Res CERN, Geneva, Switzerland

[50] Tech Univ Munich, Excellence Cluster Univ, D-80290 Munich, Germany

来源：

PHYSICS LETTERS B | 2016年 / 758卷

基金：

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

关键词：

ENERGY-DEPENDENCE; MID-RAPIDITY; ENHANCEMENT;

D O I：

10.1016/j.physletb.2016.05.027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The multi-strange baryon yields in Pb-Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, Xi and Omega production rates have been measured with the ALICE experiment as a function of transverse momentum, p(T), in p-Pb collisions at a centre-of-mass energy of,/sNN = 5.02 TeV. The results cover the kinematic ranges 0.6 GeV/c < p(T) < 7.2 GeV/c and 0.8 GeV/c < p(T) < 5 GeV/c, for E and S-2 respectively, in the common rapidity interval 0.5 < ycms < 0. Multi -strange baryons have been identified by reconstructing their weak decays into charged particles. The p(T) spectra are analysed as a function of event charged -particle multiplicity, which in p-Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pb-Pb collisions. The measured p -r distributions are compared to the expectations from a Blast -Wave model. The parameters which describe the production of lighter hadron species also describe the hyperon spectra in high multiplicity p-Pb collisions. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pb-Pb collisions. A continuous increase in the yield ratios as a function of multiplicity is observed in p-Pb data, the values of which range from those measured in minimum bias pp to the ones in Pb-Pb collisions. A statistical model qualitatively describes this multiplicity dependence using a canonical suppression mechanism, in which the small volume causes a relative reduction of hadron production dependent on the strangeness content of the hyperon. (C) 2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http/creativecommons,org/licenses/by/4.0). Funded by SCOAP(3).

引用

页码：389 / 401

页数：13

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