2021/02/28 by CMS Collaboration, A. M. Sirunyan, A. Tumasyan +98 · 64 citations
Physics and Astronomy · #Charged particle #Energy (signal processing) #Hadron #High-Energy Particle Collisions Research #Ion #Jet (fluid) #Jet quenching #Large Hadron Collider #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Quark–gluon plasma #Range (aeronautics) #Rapidity #Spectral line #Transverse plane #hep-ex #nucl-ex
paper · pdf · doi:10.1007/jhep05(2021)284
published in Journal of High Energy Physics 2021(5) (Springer Nature) · Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-18-014 (CMS Public Pages)
openalex created_date 2021/03/15 · openalex publication_date 2021/05/01 · arxiv created 2021/06/09 · arxiv updated 2021/06/11 · openalex updated_date 2026/08/06
A bstract Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 μ b − 1 and 27.4 pb − 1 , respectively. Jets with different areas are reconstructed using the anti- k T algorithm by varying the distance parameter R . The measurements are performed using jets with transverse momenta ( p T ) greater than 200 GeV and in a pseudorapidity range of |η| < 2. To reveal the medium modification of the jet spectra in PbPb collisions, the properly normalized ratio of spectra from PbPb and pp data is used to extract jet nuclear modification factors as functions of the PbPb collision centrality, p T and, for the first time, as a function of R up to 1.0. For the most central collisions, a strong suppression is observed for high- p T jets reconstructed with all distance parameters, implying that a significant amount of jet energy is scattered to large angles. The dependence of jet suppression on R is expected to be sensitive to both the jet energy loss mechanism and the medium response, and so the data are compared to several modern event generators and analytic calculations. The models considered do not fully reproduce the data.