Электронный каталог

Статья

Acharya, S.
Charged-Particle Production as a Function of the Relative Transverse Activity Classifier in pp, p-Pb, and Pb-Pb Collisions at the LHC / S.Acharya, B.Batyunya, C.Ceballos Sanchez, R.A.Diaz, S.Grigoryan, A.Kondratyev, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.] // Journal of High Energy Physics [Electronic resource]. – 2024. – Vol. 2024, No. 1. – P. 056. – URL: https://doi.org/10.1007/JHEP01(2024)056. – Bibliogr.: 55.

Measurements of charged-particle production in pp, p–Pb, and Pb–Pb collisions in the toward, away, and transverse regions with the ALICE detector are discussed. These regions are defined event-by-event relative to the azimuthal direction of the charged trigger particle, which is the reconstructed particle with the largest transverse momentum (ptrig T ) in the range 8 < ptrig T < 15 GeV/c. The toward and away regions contain the primary and recoil jets, respectively; both regions are accompanied by the underlying event (UE). In contrast, the transverse region perpendicular to the direction of the trigger particle is dominated by the so-called UE dynamics, and includes also contributions from initial- and final-state radiation. The relative transverse activity classifier, RT = N T ch/⟨N T ch⟩, is used to group events according to their UE activity, where N T ch is the charged-particle multiplicity per event in the transverse region and ⟨N T ch⟩ is the mean value over the whole analysed sample. The energy dependence of the RT distributions in pp collisions at √s = 2.76, 5.02, 7, and 13 TeV is reported, exploring the Koba-Nielsen-Olesen (KNO) scaling properties of the multiplicity distributions. The first measurements of charged-particle pT spectra as a function of RT in the three azimuthal regions in pp, p–Pb, and Pb–Pb collisions at √sNN = 5.02 TeV are also reported. Data are compared with predictions obtained from the event generators PYTHIA 8 and EPOS LHC. This set of measurements is expected to contribute to the understanding of the origin of collective-like effects in small collision systems (pp and p–Pb).



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 343 в - Взаимодействие протонов с ядрами (Z>2). Изобарно- аналоговые состояния
Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами