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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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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
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
2023-04-08 15:54:09
@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}},
  doi          = {{10.1103/PhysRevC.98.014912}},
  volume       = {{98}},
  year         = {{2018}},
}