Energetic quarks and gluons traversing a hot and dense quark-gluon plasma deposit energy and momentum into the medium before hadronizing to collimated sprays of particles, known as jets. This energy-momentum deposition is expected to produce medium responses, collectively known as jet wakes, with “diffusion wake” denoting a depletion of particles in the direction opposite to the propagating jet. The diffusion wake is studied by comparing dijet-hadron correlations measured in lead-lead (PbPb) and proton-proton (pp) collisions. The analysis uses PbPb and pp data recorded at a nucleon-nucleon (NN) center-of-mass energy 5.02 TeV with the CMS detector at the CERN LHC. By exploring how the dijet-hadron correlation distributions differ for various pseudorapidity separations of the two jets in the dijet, the presence of a jet diffusion wake is firmly established. The diffusion wake signal has a significance greater than 5 standard deviations for charged particles in the transverse momentum range 1 < 2 GeV. The measurements are compared with model predictions with and without jet wake effects, providing new insights into quark-gluon plasma properties and the formation of jet-induced wakes.

Observation of the Jet Diffusion Wake Using Dijets in Heavy-Ion Collisions / Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Benato, L., Bergauer, T., Dragicevic, M., Hussain, P. s., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Schieck, J., Schöfbeck, R., Shooshtari, M., Sonawane, M., Van Den Bossche, N., Waltenberger, W., Wulz, C.-E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 137:7(2026). [10.1103/g49y-8cjl]

Observation of the Jet Diffusion Wake Using Dijets in Heavy-Ion Collisions

Cunqueiro Mendez, L.;Del Re, D.;Del Vecchio, M.;Organtini, G.;Paramatti, R.;Pauletto, T.;Rahatlou, S.;Santanastasio, F.;
2026

Abstract

Energetic quarks and gluons traversing a hot and dense quark-gluon plasma deposit energy and momentum into the medium before hadronizing to collimated sprays of particles, known as jets. This energy-momentum deposition is expected to produce medium responses, collectively known as jet wakes, with “diffusion wake” denoting a depletion of particles in the direction opposite to the propagating jet. The diffusion wake is studied by comparing dijet-hadron correlations measured in lead-lead (PbPb) and proton-proton (pp) collisions. The analysis uses PbPb and pp data recorded at a nucleon-nucleon (NN) center-of-mass energy 5.02 TeV with the CMS detector at the CERN LHC. By exploring how the dijet-hadron correlation distributions differ for various pseudorapidity separations of the two jets in the dijet, the presence of a jet diffusion wake is firmly established. The diffusion wake signal has a significance greater than 5 standard deviations for charged particles in the transverse momentum range 1 < 2 GeV. The measurements are compared with model predictions with and without jet wake effects, providing new insights into quark-gluon plasma properties and the formation of jet-induced wakes.
2026
jet-diffusion-wake; heavy-ion; CMS
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the Jet Diffusion Wake Using Dijets in Heavy-Ion Collisions / Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Benato, L., Bergauer, T., Dragicevic, M., Hussain, P. s., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Schieck, J., Schöfbeck, R., Shooshtari, M., Sonawane, M., Van Den Bossche, N., Waltenberger, W., Wulz, C.-E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 137:7(2026). [10.1103/g49y-8cjl]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1773805
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