Measurement of inclusive and leading subjet fragmentation in pp and Pb-Pb collisions at √sNN=5.02 TeV

被引：3

作者：

Acharya, S. ^{[138
,145
]}

Adamova, D. ^{[97
]}

Adler, A. ^{[80
]}

Rinella, G. Aglieri ^{[43
]}

Agnello, M. ^{[38
,39
]}

Agrawal, N. ^{[61
]}

Ahammed, Z. ^{[145
]}

Ahmad, S. ^{[17
]}

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

Ahuja, I. ^{[48
]}

Akindinov, A. ^{[153
]}

Al-Turany, M. ^{[111
,112
]}

Aleksandrov, D. ^{[153
]}

Alessandro, B. ^{[66
]}

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

Alfaro Molina, R. ^{[77
]}

Ali, B. ^{[17
]}

Ali, Y. ^{[15
]}

Alici, A. ^{[30
,31
]}

Alizadehvandchali, N. ^{[127
]}

Alkin, A. ^{[43
]}

Alme, J. ^{[22
]}

Alocco, G. ^{[62
]}

Alt, T. ^{[74
]}

Altsybeev, I. ^{[153
]}

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

Andrei, C. ^{[56
]}

Andronic, A. ^{[148
]}

Anguelov, V. ^{[107
]}

Antinori, F. ^{[64
]}

Antonioli, P. ^{[61
]}

Anuj, C. ^{[17
]}

Apadula, N. ^{[85
]}

Aphecetche, L. ^{[117
]}

Appelshaeuser, H. ^{[74
]}

Arcelli, S. ^{[30
,31
]}

Arnaldi, R. ^{[66
]}

Arsene, I. C. ^{[21
]}

Arslandok, M. ^{[150
]}

Augustinus, A. ^{[43
]}

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

Aziz, S. ^{[83
]}

Azmi, M. D. ^{[17
]}

Badala, A. ^{[63
]}

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

Bai, X. ^{[111
,112
]}

Bailhache, R. ^{[74
]}

Bailung, Y. ^{[58
]}

Bala, R. ^{[102
]}

Balbino, A. ^{[38
,39
]}

机构：

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

[2] AGH Univ Sci & Technol, Krakow, Poland

[3] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine

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

[5] 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, Yucatan, Mexico

[11] Chicago State Univ, Chicago, IL USA

[12] China Inst Atom Energy, Beijing, Peoples R China

[13] Chungbuk Natl Univ, Cheongju, South Korea

[14] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia

[15] COMSATS Univ Islamabad, Islamabad, Pakistan

[16] Creighton Univ, Omaha, NE 68178 USA

[17] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India

[18] Pusan Natl Univ, Dept Phys, Pusan, South Korea

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

[20] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

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

[22] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[23] Univ Pavia, Dipartimento Fis, Pavia, Italy

[24] Univ Cagliari, Dipartimento Fis, Cagliari, Italy

[25] Sezione Ist Nazl Fis Nucl, Cagliari, Italy

[26] Univ Trieste, Dipartimento Fis, Trieste, Italy

[27] Sezione Ist Nazl Fis Nucl, Trieste, Italy

[28] Univ Turin, Dipartimento Fis, Turin, Italy

[29] Sezione Ist Nazl Fis Nucl, Turin, Italy

[30] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy

[31] Sezione Ist Nazl Fis Nucl, Bologna, Italy

[32] Univ Catania, Dipartimento Fis & Astron, Catania, Italy

[33] Sezione Ist Nazl Fis Nucl, Catania, Italy

[34] Univ Padua, Dipartimento Fis & Astron, Padua, Italy

[35] Sezione Ist Nazl Fis Nucl, Padua, Italy

[36] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy

[37] Univ Salerno, Grp Collegato INFN, Salerno, Italy

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

[39] Sezione Ist Nazl Fis Nucl, 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 Sci & Engn, 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：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 05期

基金：

日本学术振兴会; 欧洲研究理事会; 新加坡国家研究基金会; 欧盟地平线“2020”; 巴西圣保罗研究基金会; 芬兰科学院; 瑞典研究理事会; 奥地利科学基金会; 英国科学技术设施理事会; 中国国家自然科学基金; 美国能源部; 美国国家科学基金会;

关键词：

Jets and Jet Substructure; Quark-Gluon Plasma; NUCLEUS-NUCLEUS COLLISIONS; MATTER; ENERGY;

D O I：

10.1007/JHEP05(2023)245

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

This article presents new measurements of the fragmentation properties of jets in both proton-proton (pp) and heavy-ion collisions with the ALICE experiment at the Large Hadron Collider (LHC). We report distributions of the fraction z(r) of transverse momentum carried by subjets of radius r within jets of radius R. Charged-particle jets are reconstructed at midrapidity using the anti- kT algorithm with jet radius R = 0.4, and subjets are reconstructed by reclustering the jet constituents using the anti-k(T) algorithm with radii r = 0.1 and r = 0.2. In proton-proton collisions, we measure both the inclusive and leading subjet distributions. We compare these measurements to perturbative calculations at next-to-leading logarithmic accuracy, which suggest a large impact of threshold resummation and hadronization effects on the z(r) distribution. In heavy-ion collisions, we measure the leading subjet distributions, which allow access to a region of harder jet fragmentation than has been probed by previous measurements of jet quenching via hadron fragmentation distributions. The z(r) distributions enable extraction of the parton-to-subjet fragmentation function and allow for tests of the universality of jet fragmentation functions in the quark-gluon plasma (QGP). We find no significant modification of z(r) distributions in Pb-Pb compared to pp collisions. However, the distributions are also consistent with a hardening trend for zr < 0.95, as predicted by several jet quenching models. As z(r) -> 1 our results indicate that any such hardening effects cease, exposing qualitatively new possibilities to disentangle competing jet quenching mechanisms. By comparing our results to theoretical calculations based on an independent extraction of the parton-to-jet fragmentation function, we find consistency with the universality of jet fragmentation and no indication of factorization breaking in the QGP.

引用

页数：34

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