| Issue |
EPJ Web Conf.
Volume 364, 2026
XXXI International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions “Quark Matter 2025”
|
|
|---|---|---|
| Article Number | 04013 | |
| Number of page(s) | 4 | |
| Section | Collective Dynamics & Small Systems | |
| DOI | https://doi.org/10.1051/epjconf/202636404013 | |
| Published online | 17 April 2026 | |
https://doi.org/10.1051/epjconf/202636404013
Collectivity of high transverse momentum particles in small collision systems at CMS
Indian Institute of Technology Madras, Chennai
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Published online: 17 April 2026
Abstract
Studies at the LHC have revealed signatures of collective dynamics in high-multiplicity proton-lead (pPb) collisions through multiparticle correlation techniques. However, no clear evidence of jet quenching has been established in pPb events. This discrepancy raises the fundamental question: How can a medium that reproduces hydrodynamic-like collective behavior and strongly influences the distribution of soft hadrons show little to no modification of high-pT particles? To address this puzzle, we present a detailed measurement of transverse momentum and multiplicity-dependent Fourier coefficients (vn) in pPb collisions at √sNN = 8.16 TeV with the CMS detector. In particular, we extend pT-differential multiparticle cumulant measurements with the subevent technique to high transverse momentum. A comparison with PbPb collisions in similar multiplicity ranges is also performed.
© The Authors, published by EDP Sciences, 2026
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