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Dijet imbalance measurements in Au+Au and pp collisions at sNN =200 GeV at STAR

  • STAR Collaboration
  • AGH University of Krakow
  • University of Kentucky
  • Joint Institute for Nuclear Research
  • Panjab University
  • Variable Energy Cyclotron Centre India
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Moscow Engineering Physics Institute
  • Texas A&M University
  • Brookhaven National Laboratory
  • Tsinghua University
  • Central China Normal University
  • National Institute of Science Education and Research
  • University of Houston
  • University of Jammu
  • University of Texas at Austin
  • Czech Technical University in Prague
  • Czech Academy of Sciences
  • Kent State University
  • Rice University
  • Lehigh University
  • Yale University
  • University of California at Davis
  • Ohio State University
  • Chinese Academy of Sciences
  • CAS - Institute of Modern Physics
  • Creighton University
  • Lawrence Berkeley National Laboratory
  • University of California at Berkeley
  • Institute of Physics Bhubaneswar

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

We report the first dijet transverse momentum asymmetry measurements from Au+Au and pp collisions at RHIC. The two highest-energy back-to-back jets reconstructed from fragments with transverse momenta above 2 GeV/c display a significantly higher momentum imbalance in heavy-ion collisions than in the pp reference. When reexamined with correlated soft particles included, we observe that these dijets then exhibit a unique new feature - momentum balance is restored to that observed in pp for a jet resolution parameter of R=0.4, while rebalancing is not attained with a smaller value of R=0.2.

Original languageEnglish
Article number062301
JournalPhysical Review Letters
Volume119
Issue number6
DOIs
StatePublished - Aug 10 2017

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