A1 Journal article (refereed)
Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s = 13 TeV and in p–Pb collisions at √sNN = 5.02 TeV (2024)


ALICE Collaboration. (2024). Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s = 13 TeV and in p–Pb collisions at √sNN = 5.02 TeV. Journal of High Energy Physics, 2024(3), Article 92. https://doi.org/10.1007/JHEP03(2024)092


JYU authors or editors


Publication details

All authors or editorsALICE Collaboration

Journal or seriesJournal of High Energy Physics

ISSN1126-6708

eISSN1029-8479

Publication year2024

Publication date15/03/2024

Volume2024

Issue number3

Article number92

PublisherSpringer Science and Business Media LLC

Publication countryGermany

Publication languageEnglish

DOIhttps://doi.org/10.1007/JHEP03(2024)092

Publication open accessOpenly available

Publication channel open accessOpen Access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/94630

Publication is parallel publishedhttps://arxiv.org/abs/2308.16591


Abstract

Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at √s=13 TeV and p−Pb collisions at √sNN=5.02 TeV. The correlation functions are measured as a function of relative azimuthal angle Δφ and pseudorapidity separation Δη for pairs of primary charged particles within the pseudorapidity interval |η|<0.9 and the transverse-momentum interval 1<4 GeV/c. Flow coefficients are extracted for the long-range correlations (1.6<|Δη|<1.8) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events.


Keywordsparticle physics


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Ministry reportingYes

Reporting Year2024

Preliminary JUFO rating3


Last updated on 2024-03-07 at 20:07