0577062 - ÚJF 2024 RIV NL eng J - Článek v odborném periodiku
Acharya, S. - Adamová, Dagmar - Adler, A. - Aglieri Rinella, G. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Filová, V. - Grecká, Ekaterina - Grund, D. - Herman, T. - Horák, D. - Isakov, Artem - Kotliarov, Artem - Krupová, D. M. - Křížek, Filip - Křížková Gajdošová, K. - Kushpil, Svetlana - Petráček, V. - Šafařík, K. - Torres, S. R. - Závada, Petr … celkem 1032 autorů
Study of charged particle production at high p_T using event topology in pp, p-Pb and Pb-Pb collisions at √s_NN = 5.02 TeV.
Physics Letters. B. Roč. 843, AUG (2023), č. článku 137649. ISSN 0370-2693. E-ISSN 1873-2445
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271 ; RVO:61389005
Klíčová slova: ALICE collaboration * heavy ion collisions * hard scattering
Obor OECD: Nuclear physics; Particles and field physics (FZU-D)
Impakt faktor: 4.3, rok: 2023 ; AIS: 1.232, rok: 2023
Způsob publikování: Open access
Web výsledku:
https://doi.org/10.1016/j.physletb.2022.137649DOI: https://doi.org/10.1016/j.physletb.2022.137649

This letter reports measurements which characterize the underlying event associated with hard scatterings at mid-pseudorapidity (|eta| < 0.8) in pp, p-Pband Pb-Pb collisions at centre-of-mass energy per nucleon pair, root sNN= 5.02TeV. The measurements are performed with ALICE at the LHC. Different multiplicity classes are defined based on the event activity measured at forward rapidities. The hard scatterings are identified by the leading particle defined as the charged particle with the largest transverse momentum (pT) in the collision and having 8< pT< 15GeV/c. The p(T) spectra of associated particles (0.5= pT< 6GeV/c) are measured in different azimuthal regions defined with respect to the leading particle direction: toward, transverse, and away. The associated charged particle yields in the transverse region are subtracted from those of the away and toward regions. The remaining jet-like yields are reported as a function of the multiplicity measured in the transverse region. The measurements show a suppression of the jet-like yield in the away region and an enhancement of high-p(T) associated particles in the toward region in central Pb-Pb collisions, as compared to minimum-bias pp collisions. These observations are consistent with previous measurements that used two-particle correlations, and with an interpretation in terms of parton energy loss in a high-density quark gluon plasma. These yield modifications vanish in peripheral Pb-Pb collisions and are not observed in either high-multiplicity pp or p-Pb collisions.
Trvalý link: https://hdl.handle.net/11104/0346328