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Title: Dijet imbalance measurements in Au + Au and p p collisions at s N N = 200 GeV at STAR

Journal Article · · Physical Review Letters
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In this paper, 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. Finally, 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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC); Univ. of Illinois, Chicago, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
Contributing Organization:
STAR Collaboration
Grant/Contract Number:
SC0012704; FG02-94ER40865
OSTI ID:
1376109
Alternate ID(s):
OSTI ID: 1374774; OSTI ID: 1666123
Report Number(s):
BNL-113966-2017-JA; R&D Project: PO 004; KB0202012; TRN: US1702799
Journal Information:
Physical Review Letters, Vol. 119, Issue 6; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

References (34)

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Measurement of the Splitting Function in pp and Pb-Pb Collisions at √sNN=5.02  TeV text January 2018


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