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

Academic Article


  • © 2017 American Physical Society. 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.
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    Author List

  • Adamczyk L; Adkins JK; Agakishiev G; Aggarwal MM; Ahammed Z; Alekseev I; Anderson DM; Aoyama R; Aparin A; Arkhipkin D
  • Volume

  • 119
  • Issue

  • 6