Collectivity of high transverse momentum particles in small collision systems at CMS

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.