Evidence for Similar Collectivity of High Transverse-Momentum Particles in p-Pb and Pb-Pb Collisions


Chekhovsky V., Hayrapetyan A., Makarenko V., Tumasyan A., Adam W., Andrejkovic J., ...More

Physical review letters, vol.135, no.7, pp.71903, 2025 (SCI-Expanded, Scopus) identifier identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 135 Issue: 7
  • Publication Date: 2025
  • Doi Number: 10.1103/t5kp-vsv7
  • Journal Name: Physical review letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, DIALNET, Nature Index
  • Page Numbers: pp.71903
  • Middle East Technical University Affiliated: Yes

Abstract

Charged hadron elliptic anisotropies (v_{2}) are presented over a wide transverse momentum (p_{T}) 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 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 noncollective effects. At high p_{T} (p_{T}>8 GeV), significant positive v_{2} values that are similar between pPb and PbPb collisions at comparable charged particle multiplicities are observed. This observation suggests a common origin for the multiparticle collectivity for high-p_{T} particles in the two systems.