Journal Article Ppublish 2 citations
PubMed: 42675426 DOI: 10.1103/g49y-8cjl
Observation of the Jet Diffusion Wake Using Dijets in Heavy-Ion Collisions.
Phys Rev Lett 137(7):071902
Authors: A Hayrapetyan, V Makarenko, A Tumasyan, W Adam, L Benato, T Bergauer, M Dragicevic, P S Hussain, M Jeitler, N Krammer, A Li, D Liko, M Matthewman, J Schieck, R Schöfbeck, M Shooshtari, M Sonawane, N Van Den Bossche, W Waltenberger, C-E Wulz, T Janssen, H Kwon, D Ocampo Henao, T Van Laer, P Van Mechelen, D Ahmadi, J Bierkens, N Breugelmans, J D'Hondt, S Dansana, A De Moor, M Delcourt, C Gupta, F Heyen, Y Hong, P Kashko, S Lowette, I Makarenko, S Nandakumar, S Tavernier, M Tytgat, G P Van Onsem, S Van Putte, D Vannerom, T Wybouw, A Beshr, B Bilin, F Caviglia Roman, B Clerbaux, A K Das … and 2437 other authors
Affiliations
- Yerevan Physics Institute, Yerevan, Armenia.
- Institut für Hochenergiephysik, Vienna, Austria.
- Universiteit Antwerpen, Antwerpen, Belgium.
- Vrije Universiteit Brussel, Brussel, Belgium.
- Université Libre de Bruxelles, Bruxelles, Belgium.
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 sqrt[s_{NN}]=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<p_{T}<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.
MeSH
Physics, Plasma