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

PHENIX Collaboration

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 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.

Original languageEnglish
Article number064904
JournalPhysical Review C
Volume97
Issue number6
DOIs
Publication statusPublished - 2018 Jun 11

Fingerprint

anisotropy
collisions
quarks
nuclei
transverse momentum
pions
kinetic energy
hydrodynamics
scaling
protons
geometry

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

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

In: Physical Review C, Vol. 97, No. 6, 064904, 11.06.2018.

Research output: Contribution to journalArticle

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title = "Measurements of mass-dependent azimuthal anisotropy in central p + Au, d + Au, and He 3 + Au collisions at sNN =200 GeV",
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 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.",
author = "{PHENIX Collaboration} and A. Adare and C. Aidala and Ajitanand, {N. N.} and Y. Akiba and M. Alfred and V. Andrieux and N. Apadula and H. Asano and B. Azmoun and V. Babintsev and A. Bagoly and M. Bai and Bandara, {N. S.} and B. Bannier and Barish, {K. N.} and S. Bathe and A. Bazilevsky and M. Beaumier and S. Beckman and R. Belmont and A. Berdnikov and Y. Berdnikov and Blau, {D. S.} and M. Boer and Bok, {J. S.} and K. Boyle and Brooks, {M. L.} and J. Bryslawskyj and V. Bumazhnov and S. Campbell and {Canoa Roman}, V. and R. Cervantes and Chen, {C. H.} and Chi, {C. Y.} and M. Chiu and Choi, {I. J.} and Choi, {J. B.} and T. Chujo and Z. Citron and M. Connors and N. Cronin and M. Csan{\'a}d and T. Cs{\"o}rgo and Danley, {T. W.} and A. Datta and Daugherity, {M. S.} and G. David and K. Deblasio and K. Dehmelt and Byungsik Hong",
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T1 - Measurements of mass-dependent azimuthal anisotropy in central p + Au, d + Au, and He 3 + Au collisions at sNN =200 GeV

AU - PHENIX Collaboration

AU - Adare, A.

AU - Aidala, C.

AU - Ajitanand, N. N.

AU - Akiba, Y.

AU - Alfred, M.

AU - Andrieux, V.

AU - Apadula, N.

AU - Asano, H.

AU - Azmoun, B.

AU - Babintsev, V.

AU - Bagoly, A.

AU - Bai, M.

AU - Bandara, N. S.

AU - Bannier, B.

AU - Barish, K. N.

AU - Bathe, S.

AU - Bazilevsky, A.

AU - Beaumier, M.

AU - Beckman, S.

AU - Belmont, R.

AU - Berdnikov, A.

AU - Berdnikov, Y.

AU - Blau, D. S.

AU - Boer, M.

AU - Bok, J. S.

AU - Boyle, K.

AU - Brooks, M. L.

AU - Bryslawskyj, J.

AU - Bumazhnov, V.

AU - Campbell, S.

AU - Canoa Roman, V.

AU - Cervantes, R.

AU - Chen, C. H.

AU - Chi, C. Y.

AU - Chiu, M.

AU - Choi, I. J.

AU - Choi, J. B.

AU - Chujo, T.

AU - Citron, Z.

AU - Connors, M.

AU - Cronin, N.

AU - Csanád, M.

AU - Csörgo, T.

AU - Danley, T. W.

AU - Datta, A.

AU - Daugherity, M. S.

AU - David, G.

AU - Deblasio, K.

AU - Dehmelt, K.

AU - Hong, Byungsik

PY - 2018/6/11

Y1 - 2018/6/11

N2 - 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.

AB - 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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U2 - 10.1103/PhysRevC.97.064904

DO - 10.1103/PhysRevC.97.064904

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