Evidence for Similar Collectivity of High Transverse-Momentum Particles in p-Pb and Pb-Pb CollisionsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 1 октября 2025 г.
Аннотация:Charged hadron elliptic anisotropies (v2) are presented over a wide transverse momentum (pT) range for proton-lead (pPb) and lead-lead (PbPb) collisions at nucleon-nucleon center-of-mass energies of 8.16 and 5.02 TeV, respectively. The data were recorded by the CMS experiment and correspond to integrated luminosities of 186 nb−1 and 0.607 nb−1 for the pPb and PbPb systems, respectively. A four-particle cumulant analysis is performed using subevents separated in pseudorapidity to effectively suppress non-collective effects. At high pT (pT> 8 GeV), significant positive v2 values are observed that are similar between pPb and PbPb collisions at comparable charged particle multiplicities. This observation suggests a common origin for the multi-particle collectivity for high-pTparticles in the two systems.