Multiplicity dependence of charged-particle intra-jet properties in pp collisions at √s=13 TeV

被引：0

作者：

Acharya, S. ^{[140
]}

Adamova, D. ^{[97
]}

Rinella, G. Aglieri ^{[43
]}

Aglietta, L. ^{[29
,30
]}

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
]}

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 Collegato 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：

EUROPEAN PHYSICAL JOURNAL C | 2024年 / 84卷 / 10期

基金：

巴西圣保罗研究基金会; 瑞典研究理事会; 新加坡国家研究基金会; 日本学术振兴会; 芬兰科学院; 美国能源部; 奥地利科学基金会; 欧洲研究理事会; 中国国家自然科学基金;

关键词：

PROTON-PROTON COLLISIONS; PB COLLISIONS; PERTURBATIVE QCD; CROSS-SECTIONS; PARTON; DISTRIBUTIONS; CENTRALITY; SHAPES; ENERGY;

D O I：

10.1140/epjc/s10052-024-13228-0

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：

The first measurement of the multiplicity dependence of intra-jet properties of leading charged-particle jets in proton-proton (pp) collisions is reported. The mean charged-particle multiplicity and jet fragmentation distributions are measured in minimum-bias and high-multiplicity pp collisions at center-of-mass energy root s = 13 TeV using the ALICE detector. Jets are reconstructed from charged particles produced in the midrapidity region (|eta| < 0.9) using the sequential recombination anti-kT algorithm with jet resolution parameters R = 0.2, 0.3, and 0.4 for the transverse momentum ( p(T)) interval 5-110 GeV/c. The high-multiplicity events are selected by the forward V0 scintillator detectors. The mean charged-particle multiplicity inside the leading jet cone rises monotonically with increasing jet pT in qualitative agreement with previous measurements at lower energies. The distributions of jet fragmentation function variables z(ch) and xi(ch) are measured for different jet- pT intervals. Jet- pT independent fragmentation of leading jets is observed for wider jets except at high- and low-z(ch) values. The observed "hump-backed plateau" structure in the. ch distribution indicates suppression of low- p(T) particles. In high-multiplicity events, an enhancement of the fragmentation probability of low-zch particles accompanied by a suppression of high-z(ch) particles is observed compared to minimum-bias events. This behavior becomes more prominent for low- p(T) jets with larger jet radius. The results are compared with predictions of QCD-inspired event generators, PYTHIA8 with Monash 2013 tune and EPOS LHC. It is found that PYTHIA8 qualitatively reproduces the jet modification in high-multiplicity events except at high jet p(T). These measurements provide important constraints to models of jet fragmentation.

引用

页数：26

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