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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

Adare, A.; Aidala, C.; Ajitanand, N N; Akiba, Y.; Al-Bataineh, H; Alexander, J; Christiansen, Peter LU ; Gustafsson, Hans-Åke LU ; Haslum, Eva LU and Oskarsson, Anders LU , et al. (2018) In Physical Review C 98(1).
Abstract
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... (More)
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. (Less)
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Contribution to journal
publication status
published
subject
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Physical Review C
volume
98
issue
1
publisher
American Physical Society
external identifiers
  • scopus:85050823469
ISSN
2469-9985
DOI
10.1103/PhysRevC.98.014912
language
English
LU publication?
yes
id
a54d3552-c866-450f-8c14-1e67d3e80570
date added to LUP
2018-08-17 15:16:25
date last changed
2019-02-20 11:24:26
@article{a54d3552-c866-450f-8c14-1e67d3e80570,
  abstract     = {We present measurements of two-particle angular correlations between high-transverse-momentum (2&lt;pT&lt;11 GeV/c) π0 observed at midrapidity (|η|&lt;0.35) and particles produced either at forward (3.1&lt;η&lt;3.9) or backward (−3.7&lt;η&lt;−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       = {Adare, A. and Aidala, C. and Ajitanand, N N and Akiba, Y. and Al-Bataineh, H and Alexander, J and Christiansen, Peter and Gustafsson, Hans-Åke and Haslum, Eva and Oskarsson, Anders and Rosendahl, Sarah and Silvermyr, David and Stenlund, Evert and Zhou, L},
  issn         = {2469-9985},
  language     = {eng},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review C},
  title        = {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},
  url          = {http://dx.doi.org/10.1103/PhysRevC.98.014912},
  volume       = {98},
  year         = {2018},
}