Evidence for similar collectivity of high transverse momentum particles in pPb and PbPb collisions

Abstract

Charged hadron elliptic anisotropies ($v_2$) are presented over a wide transverse momentum ($p_{\text{T}}$) 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 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 $p_{\text{T}}$ ($p_{\text{T}}$ $>$ 8 GeV), significant positive $v_2$ 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-$p_{\text{T}}$ particles in the two systems.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-23-002 (CMS Public Pages)

References in corpus (11)

• The CMS trigger system
• Elliptic and triangular flow in event-by-event (3+1)D viscous hydrodynamics
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Performance of the CMS Level-1 trigger in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Electron and photon reconstruction and identification with the CMS experiment at the CERN LHC
• Evidence for collective multi-particle correlations in pPb collisions
• Azimuthal anisotropy of charged particles at high transverse momenta in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Overview of high-density QCD studies with the CMS experiment at the LHC
• Strategies and performance of the CMS silicon tracker alignment during LHC Run 2
• Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV

Cited by in corpus (3)

• Bayesian Constraints on Pre-Equilibrium Jet Quenching and Predictions for Oxygen Collisions
• Investigating jet induced identified hadron productions from the relative transverse activity classifier in pp collision at LHC
• Reconstructing jet anisotropies with cumulants