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Centrality-Dependent Modification of Jet-Production Rates in Deuteron-Gold Collisions at sNN =200 GeV

  • (PHENIX Collaboration)
  • University of Colorado Boulder
  • University of Massachusetts
  • University of Michigan, Ann Arbor
  • Stony Brook University
  • RIKEN
  • Brookhaven National Lab
  • New Mexico State University
  • Howard University
  • Columbia University
  • High Energy Accelerator Research Organization, Tsukuba
  • Kyoto University
  • Iowa State University
  • The University of Tokyo
  • Laboratoire Leprince-Ringuet
  • Oak Ridge National Laboratory
  • United States Department of Energy
  • Institute for High Energy Physics
  • Brookhaven National Laboratory
  • Florida Institute of Technology
  • University of California at Riverside
  • University of New Mexico
  • Abilene Christian University
  • City University of New York
  • Petersburg Nuclear Physics InstituteGatchina
  • University of Münster
  • Vanderbilt University
  • Peter the Great St. Petersburg Polytechnic University
  • Yonsei University
  • Russian Research Centre Kurchatov Institute
  • Los Alamos National Laboratory

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Jet production rates are measured in p+p and d+Au collisions at sNN=200 GeV recorded in 2008 with the PHENIX detector at the Relativistic Heavy Ion Collider. Jets are reconstructed using the R=0.3 anti-kt algorithm from energy deposits in the electromagnetic calorimeter and charged tracks in multiwire proportional chambers, and the jet transverse momentum (pT) spectra are corrected for the detector response. Spectra are reported for jets with 12<pT<50 GeV/c, within a pseudorapidity acceptance of |η|<0.3. The nuclear-modification factor (RdAu) values for 0%-100% d+Au events are found to be consistent with unity, constraining the role of initial state effects on jet production. However, the centrality-selected RdAu values and central-to-peripheral ratios (RCP) show large, pT-dependent deviations from unity, challenging the conventional models that relate hard-process rates and soft-particle production in collisions involving nuclei.

Original languageEnglish
Article number122301
JournalPhysical Review Letters
Volume116
Issue number12
DOIs
StatePublished - Mar 24 2016

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