| Issue |
EPJ Web Conf.
Volume 339, 2025
12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Hard Probes 2024)
|
|
|---|---|---|
| Article Number | 03001 | |
| Number of page(s) | 5 | |
| Section | Contributed Talk: High Momentum Hadrons and Correlations | |
| DOI | https://doi.org/10.1051/epjconf/202533903001 | |
| Published online | 05 November 2025 | |
https://doi.org/10.1051/epjconf/202533903001
Search for jet quenching with high pT hadron azimuthal anisotropy using subevent cumulants in pPb collisions at CMS
Indian Institute of Technology Madras
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Published online: 5 November 2025
Abstract
Measurements at the LHC have provided evidence for collective behavior in high-multiplicity proton-lead (pPb) collisions through multiparticle correlation techniques. Yet, no conclusive evidence of jet quenching — the energy loss of high-pT partons as they traverse the medium — has been detected in pPb. This raises the intriguing question: How can a medium described by hydrodynamics, and that significantly modifies the distribution of final-state hadrons, yet has no significant impact on the distribution of high-pT particles? To investigate this, a comprehensive study of differential Fourier coefficients (vn) in particle transverse momentum (pT) and event multiplicity is presented in pPb collisions recorded by the CMS experiment at a nucleon-nucleon centerof- mass energy √sNN = 8.16 TeV. In particular, new measurements of pT-differential multiparticle cumulants using the subevent method probes an extended phase space region up to a high particle pT. Additionally, we compare the results between pPb and PbPb collisions in the same multiplicity window.
© The Authors, published by EDP Sciences, 2025
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