Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s=13 TeV and in p-Pb collisions at √s.sub.NN./sub. = 5.02 TeV

0585204 - ÚJF 2025 RIV US eng J - Článek v odborném periodiku
Acharya, S. - Adamová, Dagmar - Aglieri Rinella, G. - Agnello, M. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Filová, V. - Grecká, Ekaterina - Grund, D. - Haidlová, S. - Herman, T. - Isakov, Artem - Khuntia, A. - Kotliarov, Artem - Krupová, D. M. - Křížek, Filip - Kushpil, Svetlana - Šafařík, K. - Torres, S. R. - Závada, Petr … celkem 1054 autorů
Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s=13 TeV and in p-Pb collisions at √s_NN = 5.02 TeV.
Journal of High Energy Physics. Roč. 2024, č. 3 (2024), č. článku 092. ISSN 1029-8479. E-ISSN 1029-8479
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271 ; RVO:61389005
Klíčová slova: ALICE collaboration * collective flow * hadron-hadron scattering
Obor OECD: Nuclear physics; Particles and field physics (FZU-D)
Impakt faktor: 5.4, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1007/JHEP03(2024)092

Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at root s = 13TeV and p-Pb collisions at root s(NN) = 5.02TeV. The correlation functions are measured as a function of relative azimuthal angle Delta phi and pseudorapidity separation Delta eta for pairs of primary charged particles within the pseudorapidity interval vertical bar eta vertical bar < 0.9 and the transverse-momentum interval 1 < p(T) < 4 GeV/c. Flow coefficients are extracted for the long-range correlations ( 1.6 < vertical bar Delta eta vertical bar < 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.
Trvalý link: https://hdl.handle.net/11104/0352949