Measurement of emission-angle anisotropy via long-range angular correlations with high- pT hadrons in d+Au and p+p collisions at s NN =200 GeV

Summary, in English

We present measurements of two-particle angular correlations between high-transverse-momentum (2<pT<11 GeV/c) π0 observed at midrapidity (|η|<0.35) and particles produced either at forward (3.1<η<3.9) or backward (−3.7<η<−3.1) rapidity in d+Au and p+p collisions at √sNN=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≈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.

• Author: A. Adare; C. Aidala; N N Ajitanand; Y. Akiba; H Al-Bataineh; J Alexander; Peter Christiansen; Hans-Åke Gustafsson; Eva Haslum; Anders Oskarsson; Sarah Rosendahl; David Silvermyr; Evert Stenlund; L Zhou
• Department/s: eSSENCE: The e-Science Collaboration; Particle and nuclear physics; Department of Physics
• Publishing year: 2018
• Language: English
• Publication/Series: Physical Review C
• Volume: 98
• Issue: 1
• Links: http://dx.doi.org/10.1103/PhysRevC.98.014912
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 2469-9985