Charged hadron elliptic anisotropies (𝑣2 ) are presented over a wide transverse momentum (𝑝T ) range for proton-lead (𝑝⁢Pb ) 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 𝑝⁢Pb and PbPb systems, respectively. A four-particle cumulant analysis is performed using subevents separated in pseudorapidity to effectively suppress noncollective effects. At high 𝑝T (𝑝T>8  GeV ), significant positive 𝑣2 values that are similar between 𝑝⁢Pb and PbPb collisions at comparable charged particle multiplicities are observed. This observation suggests a common origin for the multiparticle collectivity for high-𝑝T particles in the two systems.

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

Alexe, C.;Bruschini, D.;
2025

Abstract

Charged hadron elliptic anisotropies (𝑣2 ) are presented over a wide transverse momentum (𝑝T ) range for proton-lead (𝑝⁢Pb ) 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 𝑝⁢Pb and PbPb systems, respectively. A four-particle cumulant analysis is performed using subevents separated in pseudorapidity to effectively suppress noncollective effects. At high 𝑝T (𝑝T>8  GeV ), significant positive 𝑣2 values that are similar between 𝑝⁢Pb and PbPb collisions at comparable charged particle multiplicities are observed. This observation suggests a common origin for the multiparticle collectivity for high-𝑝T particles in the two systems.
2025
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/155963
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