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Measurements of mass-dependent azimuthal anisotropy in central p + Au, d + Au, and He 3 + Au collisions at sNN =200 GeV

, ; Adare, A.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Alfred, M.; Andrieux, V.; Apadula, N.; Asano, H. and Azmoun, B., et al. (2018) In Physical Review C 97(6).
Abstract

We present measurements of the transverse-momentum dependence of elliptic flow v2 for identified pions and (anti)protons at midrapidity (|η|<0.35), in 0%-5% central p+Au and He3+Au collisions at sNN=200 GeV. When taken together with previously published measurements in d+Au collisions at sNN=200 GeV, the results cover a broad range of small-collision-system multiplicities and intrinsic initial geometries. We observe a clear mass-dependent splitting of v2(pT) in d+Au and He3+Au collisions, just as in large nucleus-nucleus (A+A) collisions, and a smaller splitting in p+Au collisions. Both hydrodynamic and transport model calculations successfully describe the data at low pT (<1.5GeV/c), but fail to describe various features at... (More)

We present measurements of the transverse-momentum dependence of elliptic flow v2 for identified pions and (anti)protons at midrapidity (|η|<0.35), in 0%-5% central p+Au and He3+Au collisions at sNN=200 GeV. When taken together with previously published measurements in d+Au collisions at sNN=200 GeV, the results cover a broad range of small-collision-system multiplicities and intrinsic initial geometries. We observe a clear mass-dependent splitting of v2(pT) in d+Au and He3+Au collisions, just as in large nucleus-nucleus (A+A) collisions, and a smaller splitting in p+Au collisions. Both hydrodynamic and transport model calculations successfully describe the data at low pT (<1.5GeV/c), but fail to describe various features at higher pT. In all systems, the v2 values follow an approximate quark-number scaling as a function of the hadron transverse kinetic energy per constituent quark (KET/nq), which was also seen previously in A+A collisions.

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Physical Review C
volume
97
issue
6
publisher
American Physical Society
external identifiers
  • scopus:85048400787
ISSN
2469-9985
DOI
10.1103/PhysRevC.97.064904
language
English
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yes
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15313994-f078-4be3-9f73-eaee89320134
date added to LUP
2018-06-26 14:37:38
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2019-01-27 05:28:51
@article{15313994-f078-4be3-9f73-eaee89320134,
  abstract     = {<p>We present measurements of the transverse-momentum dependence of elliptic flow v2 for identified pions and (anti)protons at midrapidity (|η|&lt;0.35), in 0%-5% central p+Au and He3+Au collisions at sNN=200 GeV. When taken together with previously published measurements in d+Au collisions at sNN=200 GeV, the results cover a broad range of small-collision-system multiplicities and intrinsic initial geometries. We observe a clear mass-dependent splitting of v2(pT) in d+Au and He3+Au collisions, just as in large nucleus-nucleus (A+A) collisions, and a smaller splitting in p+Au collisions. Both hydrodynamic and transport model calculations successfully describe the data at low pT (&lt;1.5GeV/c), but fail to describe various features at higher pT. In all systems, the v2 values follow an approximate quark-number scaling as a function of the hadron transverse kinetic energy per constituent quark (KET/nq), which was also seen previously in A+A collisions.</p>},
  articleno    = {064904},
  author       = {,  and Adare, A. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Alfred, M. and Andrieux, V. and Apadula, N. and Asano, H. and Azmoun, B. and Babintsev, V. and Bagoly, A. and Bai, M. and Bandara, N. S. and Bannier, B. and Barish, K. N. and Bathe, S. and Bazilevsky, A. and Beaumier, M. and Beckman, S. and Belmont, R. and Berdnikov, A. and Berdnikov, Y. and Blau, D. S. and Boer, M. and Bok, J. S. and Boyle, K. and Brooks, M. L. and Bryslawskyj, J. and Bumazhnov, V. and Campbell, S. and Canoa Roman, V. and Cervantes, R. and Chen, C. H. and Chi, C. Y. and Chiu, M. and Choi, I. J. and Choi, J. B. and Chujo, T. and Citron, Z. and Connors, M. and Cronin, N. and Csanád, M. and Csörgo, T. and Danley, T. W. and Datta, A. and Daugherity, M. S. and David, G. and Deblasio, K. and Oskarsson, A. and Silvermyr, D.},
  issn         = {2469-9985},
  language     = {eng},
  month        = {06},
  number       = {6},
  publisher    = {American Physical Society},
  series       = {Physical Review C},
  title        = {Measurements of mass-dependent azimuthal anisotropy in central p + Au, d + Au, and He 3 + Au collisions at sNN =200 GeV},
  url          = {http://dx.doi.org/10.1103/PhysRevC.97.064904},
  volume       = {97},
  year         = {2018},
}