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Dijet imbalance measurements in Au plus Au and pp collisions at root s(NN)=200 GeV at STAR

Author
Adamczyk L. AGH University of Science and Technology, Poland
Lednický Richard, promovaný fyzik DrSc. dr. h. c. Institute of physics of the ASCR, JINR Dubna
et al.  STAR collaboration

Year
2017

Scientific journal
Physical Review Letters, 119 (6), 062301

Web


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.

Cite article as:
L. Adamczyk, R. Lednický, . et al., "Dijet imbalance measurements in Au plus Au and pp collisions at root s(NN)=200 GeV at STAR", Physical Review Letters, 119 (6), 062301 (2017)