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Measurement of long-range angular correlations and azimuthal anisotropies in high-multiplicity p+Au collisions at s NN =200 GeV

Aidala, C.; Akiba, Y.; Alfred, M.; Andrieux, V.; Aoki, K.; Apadula, N; Asano, H.; Ayuso, Carmen; Azmoun, B. and Babintsev, V., et al. (2017) In Physical Review C: covering nuclear physics 95(3).
Abstract

We present measurements of long-range angular correlations and the transverse momentum dependence of elliptic flow v2 in high-multiplicity p+Au collisions at sNN=200 GeV. A comparison of these results to previous measurements in high-multiplicity d+Au and He3+Au collisions demonstrates a relation between v2 and the initial collision eccentricity 2, suggesting that the observed momentum-space azimuthal anisotropies in these small systems have a collective origin and reflect the initial geometry. Good agreement is observed between the measured v2 and hydrodynamic calculations for all systems, and an argument disfavoring theoretical explanations based on initial momentum-space domain correlations is presented. The set of measurements... (More)

We present measurements of long-range angular correlations and the transverse momentum dependence of elliptic flow v2 in high-multiplicity p+Au collisions at sNN=200 GeV. A comparison of these results to previous measurements in high-multiplicity d+Au and He3+Au collisions demonstrates a relation between v2 and the initial collision eccentricity 2, suggesting that the observed momentum-space azimuthal anisotropies in these small systems have a collective origin and reflect the initial geometry. Good agreement is observed between the measured v2 and hydrodynamic calculations for all systems, and an argument disfavoring theoretical explanations based on initial momentum-space domain correlations is presented. The set of measurements presented here allows us to leverage the distinct intrinsic geometry of each of these systems to distinguish between different theoretical descriptions of the long-range correlations observed in small collision systems.

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Physical Review C: covering nuclear physics
volume
95
issue
3
publisher
American Physical Society
external identifiers
  • scopus:85016515829
  • wos:000399246900001
ISSN
2469-9985
DOI
10.1103/PhysRevC.95.034910
language
English
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yes
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672c9a8b-41f8-47e9-b292-72509c8d4c4b
date added to LUP
2017-06-13 13:03:25
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2018-09-30 04:42:11
@article{672c9a8b-41f8-47e9-b292-72509c8d4c4b,
  abstract     = {<p>We present measurements of long-range angular correlations and the transverse momentum dependence of elliptic flow v2 in high-multiplicity p+Au collisions at sNN=200 GeV. A comparison of these results to previous measurements in high-multiplicity d+Au and He3+Au collisions demonstrates a relation between v2 and the initial collision eccentricity 2, suggesting that the observed momentum-space azimuthal anisotropies in these small systems have a collective origin and reflect the initial geometry. Good agreement is observed between the measured v2 and hydrodynamic calculations for all systems, and an argument disfavoring theoretical explanations based on initial momentum-space domain correlations is presented. The set of measurements presented here allows us to leverage the distinct intrinsic geometry of each of these systems to distinguish between different theoretical descriptions of the long-range correlations observed in small collision systems.</p>},
  articleno    = {034910},
  author       = {Aidala, C. and Akiba, Y. and Alfred, M. and Andrieux, V. and Aoki, K. and Apadula, N and Asano, H. and Ayuso, Carmen and Azmoun, B. and Babintsev, V. and Bandara, N. S. and Barish, K N and Bathe, S and Bazilevsky, A and Beaumier, M. and Belmont, R and Berdnikov, A and Berdnikov, Y. and Blau, D. S. and Boer, M. and Bok, J S and Brooks, M L and Bryslawskyj, J. and Bumazhnov, V. and Butler, Christopher C. and Campbell, S. and Canoa Roman, V. and Cervantes, R. and Chi, C Y and Chiu, M and Choi, I J and Choi, J B and Citron, Z. and Connors, M. and Cronin, N. and Csanád, M and Csörgo, T. and Danley, T. W. and Daugherity, M. S. and David, G. and DeBlasio, K. and Dehmelt, K. and Denisov, A. and Deshpande, A and Desmond, E. J. and Dion, A. and Dixit, D. and Inaba, M. and Oskarsson, A. and Silvermyr, D. and , },
  issn         = {2469-9985},
  language     = {eng},
  month        = {03},
  number       = {3},
  publisher    = {American Physical Society},
  series       = {	Physical Review C: covering nuclear physics},
  title        = {Measurement of long-range angular correlations and azimuthal anisotropies in high-multiplicity p+Au collisions at s NN =200 GeV},
  url          = {http://dx.doi.org/10.1103/PhysRevC.95.034910},
  volume       = {95},
  year         = {2017},
}