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

STAR Collaboration

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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 (US)
Article number062301
JournalPhysical Review Letters
Volume119
Issue number6
DOIs
StatePublished - Aug 10 2017

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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