Measurements of Chemical Potentials in Pb-Pb Collisions at √sNN=5.02 TeV

被引:1
|
作者
Acharya, S. [142 ]
Adamova, D. [98 ]
Rinella, G. Aglieri [44 ]
Aglietta, L. [29 ,30 ]
Agnello, M. [39 ,40 ]
Agrawal, N. [31 ,32 ]
Ahammed, Z. [150 ]
Ahmad, S. [18 ]
Ahn, S. U. [83 ]
Ahuja, I. [49 ]
Akindinov, A. [151 ,156 ]
Al-Turany, M. [111 ,112 ]
Aleksandrov, D. [156 ]
Alessandro, B. [68 ]
Alfanda, H. M. [7 ]
Alfaro Molina, R. [79 ]
Ali, B. [18 ]
Alici, A. [31 ,32 ]
Alizadehvandchali, N. [131 ]
Alkin, A. [44 ]
Alme, J. [23 ]
Alocco, G. [64 ]
Alt, T. [76 ]
Altamura, A. R. [62 ]
Altsybeev, I. [108 ]
Alvarado, J. R. [56 ]
Anaam, M. N. [7 ]
Andrei, C. [57 ]
Andreou, N. [130 ]
Andronic, A. [141 ]
Andronov, E. [156 ]
Anguelov, V. [107 ]
Antinori, F. [66 ]
Antonioli, P. [63 ]
Apadula, N. [86 ]
Aphecetche, L. [118 ]
Appelshaeuser, H. [76 ]
Arata, C. [85 ]
Arcelli, S. [31 ,32 ]
Aresti, M. [25 ,26 ]
Arnaldi, R. [68 ]
Arneiro, J. G. M. C. A. [125 ]
Arsene, I. C. [22 ]
Arslandok, M. [153 ]
Augustinus, A. [44 ]
Averbeck, R. [111 ,112 ]
Azmi, M. D. [18 ]
Baba, H. [139 ]
Badala, A. [65 ]
Bae, J. [119 ]
机构
[1] Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia
[2] AGH Univ Krakow, Krakow, Poland
[3] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine
[4] Ctr Astroparticle Phys & Space Sci CAPSS, Bose Inst, Dept Phys, Kolkata, India
[5] Ctr Astroparticle Phys & Space Sci CAPSS, Kolkata, India
[6] Calif Polytech State Univ, Pasadena, CA USA
[7] Cent China Normal Univ, Wuhan, Peoples R China
[8] Ctr Aplicaciones Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba
[9] Ctr Invest & Estudios Avanzados CINVESTAV, Mexico City, DF, Mexico
[10] Ctr Invest & Estudios Avanzados CINVESTAV, Merida, Mexico
[11] Chicago State Univ, Chicago, IL USA
[12] China Inst Atom Energy, Beijing, Peoples R China
[13] China Univ Geosci, Wuhan, Peoples R China
[14] Chungbuk Natl Univ, Cheongju, South Korea
[15] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia
[16] COMSATS Univ Islamabad, Bratislava, Slovakia
[17] Creighton Univ, Omaha, NE USA
[18] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India
[19] Pusan Natl Univ, Dept Phys, Pusan, South Korea
[20] Sejong Univ, Dept Phys, Seoul, South Korea
[21] Univ Calif Berkeley, Dept Phys, Berkeley, CA USA
[22] Univ Oslo, Dept Phys, Oslo, Norway
[23] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[24] Univ Pavia, Dipartimento Fis, Pavia, Italy
[25] Univ Cagliari, Dipartimento Fis, Cagliari, Italy
[26] Sezione Ist Nazl Fis Nucl, Cagliari, Italy
[27] Univ Trieste, Dipartimento Fis, Trieste, Italy
[28] Sezione Ist Nazl Fis Nucl, Trieste, Italy
[29] Univ Turin, Dipartimento Fis, Turin, Italy
[30] Sezione Ist Nazl Fis Nucl, Turin, Italy
[31] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[32] Sezione Ist Nazl Fis Nucl, Bologna, Italy
[33] Univ Catania, Dipartimento Fis & Astron, Catania, Italy
[34] Sezione Ist Nazl Fis Nucl, Catania, Italy
[35] Univ Padua, Dipartimento Fis & Astron, Padua, Italy
[36] Sezione Ist Nazl Fis Nucl, Padua, Italy
[37] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy
[38] Grp Collegato INFN, Salerno, Italy
[39] Politecn Torino, Dipartimento DISAT, Turin, Italy
[40] Sezione Ist Nazl Fis Nucl, Turin, Italy
[41] Univ Messina, Dipartimento Sci MIFT, Messina, Italy
[42] Dipartimento Interateneo Fis M Merlin, Bari, Italy
[43] Sezione Ist Nazl Fis Nucl, Bari, Italy
[44] CERN, European Org Nucl Res, Geneva, Switzerland
[45] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[46] Western Norway Univ Appl Sci, Fac Engn & Sci, Bergen, Norway
[47] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic
[48] Univ Sofia, Fac Phys, Sofia, Bulgaria
[49] Safarik Univ, Fac Sci, Kosice, Slovakia
[50] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Frankfurt, Germany
基金
美国能源部; 欧洲研究理事会; 日本学术振兴会; 芬兰科学院; 奥地利科学基金会; 新加坡国家研究基金会; 中国国家自然科学基金; 巴西圣保罗研究基金会; 瑞典研究理事会;
关键词
NUCLEUS-NUCLEUS COLLISIONS; STRANGE BARYON PRODUCTION; HEAVY-ION COLLISIONS; PLUS AU COLLISIONS; EXCITATION-FUNCTION; HADRON-PRODUCTION; AU+AU COLLISIONS; PARTICLE RATIOS; KAON PRODUCTION; CROSS-SECTIONS;
D O I
10.1103/PhysRevLett.133.092301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
This Letter presents the most precise measurement to date of the matter-antimatter imbalance at midrapidity in Pb-Pb collisions at a center-of-mass energy per nucleon pair root s(NN) = 5.02 TeV. Using the Statistical Hadronization framework, it is possible to obtain the value of the electric charge and baryon chemical potentials, mu(Q) = -0.18 +/- 0.90 MeV and mu(B) = 0.71 +/- 0.45 MeV, with unprecedented precision. A centrality-differential study of the antiparticle-to-particle yield ratios of charged pions, protons, Omega baryons, and light (hyper)nuclei is performed. These results indicate that the system created in Pb-Pb collisions at the LHC is on average baryon-free and electrically neutral at midrapidity.
引用
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页数:15
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