Measurement of (anti)alpha production in central Pb-Pb collisions at √sNN=5.02 TeV

被引：2

作者：

Acharya, S. ^{[140
]}

Adamova, D. ^{[97
]}

Rinella, G. Aglieri ^{[43
]}

Agnello, M. ^{[30
,39
]}

Agrawal, N. ^{[62
]}

Ahammed, Z. ^{[148
]}

Ahmad, S. ^{[18
]}

Ahn, S. U. ^{[82
]}

Ahuja, I ^{[48
]}

Akindinov, A. ^{[154
]}

Al-Turany, M. ^{[109
,110
]}

Aleksandrov, D. ^{[154
]}

Alessandro, B. ^{[67
]}

Alfanda, H. M. ^{[7
]}

Alfaro Molina, R. ^{[78
]}

Ali, B. ^{[18
]}

Alici, A. ^{[31
,32
]}

Alizadehvandchali, N. ^{[129
]}

Alkin, A. ^{[43
]}

Alme, J. ^{[23
]}

Alocco, G. ^{[63
]}

Alt, T. ^{[75
]}

Altamura, A. R. ^{[61
]}

Altsybeev, I ^{[107
]}

Alvarado, J. R. ^{[55
]}

Anaam, M. N. ^{[7
]}

Andrei, C. ^{[56
]}

Andreou, N. ^{[128
]}

Andronic, A. ^{[139
]}

Andronov, E. ^{[154
]}

Anguelov, V ^{[106
]}

Antinori, F. ^{[65
]}

Antonioli, P. ^{[62
]}

Apadula, N. ^{[85
]}

Aphecetche, L. ^{[116
]}

Appelshaeuser, H. ^{[75
]}

Arata, C. ^{[84
]}

Arcelli, S. ^{[31
,32
]}

Aresti, M. ^{[25
,26
]}

Arnaldi, R. ^{[67
]}

Arneiro, J. G. M. C. A. ^{[123
]}

Arsene, I. C. ^{[22
]}

Arslandok, M. ^{[151
]}

Augustinus, A. ^{[43
]}

Averbeck, R. ^{[109
,110
]}

Azmi, M. D. ^{[18
]}

Baba, H. ^{[137
]}

Badala, A. ^{[64
]}

Bae, J. ^{[117
]}

Baek, Y. W. ^{[51
]}

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] Bose Inst, Dept Phys, Kolkata, India

[5] Bose Inst, Ctr Astroparticle Phys & Space Sci CAPSS, Kolkata, India

[6] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA

[7] Cent China Normal Univ, Wuhan, Peoples R China

[8] Ctr Aplicac 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, Islamabad, Pakistan

[17] Creighton Univ, Omaha, NE 68178 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 94720 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 Coll INFN, Salerno, Italy

[39] Politecn Torino, Dipartimento DISAT, Turin, Italy

[40] Univ Messina, Dipartimento Sci MIFT, Messina, Italy

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

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

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

[44] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia

[45] Western Norway Univ Appl Sci, Fac Engn & Sci, Bergen, Norway

[46] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic

[47] Sofia Univ, Fac Phys, Sofia, Bulgaria

[48] Safarik Univ, Fac Sci, Kosice, Slovakia

[49] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Frankfurt, Germany

[50] Fudan Univ, Shanghai, Peoples R China

来源：

PHYSICS LETTERS B | 2024年 / 858卷

基金：

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

关键词：

LIGHT-NUCLEI PRODUCTION; DEUTERON PRODUCTION; PP COLLISIONS; (ANTI-)DEUTERON PRODUCTION; MULTIPLICITY DEPENDENCE; ANTINUCLEI PRODUCTION; PARTICLE-PRODUCTION; PB+PB COLLISIONS; COALESCENCE; MATTER;

D O I：

10.1016/j.physletb.2024.138943

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this letter, measurements of (anti)alpha production in central (0-10%) Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon pair of root s(NN) = 5.02 TeV are presented, including the first measurement of an antialpha transverse-momentum spectrum. Owing to its large mass, the production of (anti)alpha is expected to be sensitive to different particle production models. The production yields and transverse-momentum spectra of nuclei are of particular interest because they provide a stringent test of these models. The averaged antialpha and alpha spectrum is compared to the spectra of lighter particles, by including it into a common blast-wave fit capturing the hydrodynamic-like flow of all particles. This fit is indicating that the (anti)alpha also participates in the collective expansion of the medium created in the collision. A blast-wave fit including only protons, (anti)alpha, and other light nuclei results in a similar flow velocity as the fit that includes all particles. A similar flow velocity, but a significantly larger kinetic freeze-out temperature is obtained when only protons and light nuclei are included in the fit. The coalescence parameter B-4 is well described by calculations from a statistical hadronization model but significantly underestimated by calculations assuming nucleus formation via coalescence of nucleons. Similarly, the (anti)alpha-to-proton ratio is well described by the statistical hadronization model. On the other hand, coalescence calculations including approaches with different implementations of the (anti)alpha substructure tend to underestimate the data.

引用

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PHYSICS LETTERS B, 2023, 846

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