Measurements at the LHC suggest collective behavior in high-multiplicity pPb collisions, yet no clear evidence of jet quenching has been observed. This raises the question of how a medium exhibiting hydrodynamic behavior can significantly modify hadron distributions while leaving high- \(p_\textrm{T}\) particles largely unaffected. To explore this, we present a study of differential Fourier coefficients ( \(v_{n}\) ) as a function of \(p_\textrm{T}\) and event multiplicity in pPb collisions at \(\sqrt{s_{_{\textrm{NN}}}} = 8.16\) TeV using CMS data. New \(p_\textrm{T}\) -differential multiparticle cumulant measurements with the subevent method extend the phase space to high \(p_\textrm{T}\) . A comparison with PbPb collisions at similar multiplicities provides insight into the medium’s interaction with high- \(p_\textrm{T}\) particles in both systems.

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Search for Jet Quenching with High \(p_\textrm{T}\) Hadron Azimuthal Anisotropy Using Subevent Cumulants in pPb Collisions at CMS

  • Rohit Kumar Singh

摘要

Measurements at the LHC suggest collective behavior in high-multiplicity pPb collisions, yet no clear evidence of jet quenching has been observed. This raises the question of how a medium exhibiting hydrodynamic behavior can significantly modify hadron distributions while leaving high- \(p_\textrm{T}\) particles largely unaffected. To explore this, we present a study of differential Fourier coefficients ( \(v_{n}\) ) as a function of \(p_\textrm{T}\) and event multiplicity in pPb collisions at \(\sqrt{s_{_{\textrm{NN}}}} = 8.16\) TeV using CMS data. New \(p_\textrm{T}\) -differential multiparticle cumulant measurements with the subevent method extend the phase space to high \(p_\textrm{T}\) . A comparison with PbPb collisions at similar multiplicities provides insight into the medium’s interaction with high- \(p_\textrm{T}\) particles in both systems.