Physics and Astronomy
Journal or Book Title
Physical Review C
We present measurements of two-particle angular correlations between high-transverse-momentum (2 < pT < 11 GeV/c) pi(0) observed at midrapidity (|eta| < 0.35) and particles produced either at forward (3.1 < eta < 3.9) or backward (-3.7 < eta < -3.1) rapidity in d + Au and p + p collisions at root s(NN) = 200 GeV. The azimuthal angle correlations for particle pairs with this large rapidity gap in the Au-going direction exhibit a characteristic structure that persists up to pT approximate to 6 GeV/c and which strongly depends on collision centrality, which is a similar characteristic to the hydrodynamical particle flow in A + A collisions. The structure is absent in the d-going direction as well as in p + p collisions, in the transverse-momentum range studied. The results indicate that the structure is shifted in the Au-going direction toward more central collisions, similar to the charged-particle pseudorapidity distributions.
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American Physical Society
Adare, A.; Apadula, Nicole J.; Dion, Alan; Hill, John C.; Hotvedt, Nels J.; Kempel, Todd; Lajoie, John G.; Lebedev, Alexandre; Lee, S. H.; Ogilvie, Craig; Patel, Milap R.; Pei, H.; Rinn, Timothy T.; Rosati, Marzia; Runchey, Jonathan C.; Sen, Abhisek; Shimomura, M.; Silva, C. L.; Timilsina, Arbin; Wei, Feng; et al.; and PHENIX Collaboration, "Measurement of emission-angle anisotropy via long-range angular correlations with high-pT hadrons in d + Au and p + p collisions at √sNN = 200 GeV" (2018). Physics and Astronomy Publications. 491.