Abstract

We measure triangular flow relative to the reaction plane at 3 GeV center-of-mass energy in Au+Au collisions at the BNL Relativistic Heavy Ion Collider. A significant

v_{3}

signal for protons is observed, which increases for higher rapidity, higher transverse momentum, and more peripheral collisions. The triangular flow is essentially rapidity-odd with a slope at mid-rapidity,

d v_{3} / d y |_{(y = 0)}

, opposite in sign compared to the slope for directed flow. No significant

v_{3}

signal is observed for charged pions and kaons. Comparisons with models suggest that a mean field potential is required to describe these results, and that the triangular shape of the participant nucleons is the result of stopping and nuclear geometry.

Figure 3

10.17182/hepdata.144480.v2/t1

Event plane resolutions for calculating $v_{3} {Ψ_{1}}$ as a function of centrality from $\sqrt{s_{NN}} = 3$ GeV Au+Au collisions at STAR.
Figure 4

10.17182/hepdata.144480.v2/t2

$v_{3} {Ψ_{1}}$ vs. centrality for $π^{+}$ , $π^{-}$ , and protons using the event plane method in $\sqrt{s_{NN}} = 3$ GeV Au+Au collisions at STAR.
Figure 5

10.17182/hepdata.144480.v2/t3

$v_{3} {Ψ_{1}}$ vs. centrality for $K^{+}$ , and $K^{-}$ using the event plane method in $\sqrt{s_{NN}} = 3$ GeV Au+Au collisions at STAR.
Figure 6

10.17182/hepdata.144480.v2/t4

$v_{3} {Ψ_{1}}$ vs. rapidity for protons in three large centrality bins from a symmetric acceptance across midrapidity in $\sqrt{s_{NN}} = 3$ GeV Au+Au...
Figure 7

10.17182/hepdata.144480.v2/t5

$v_{3} {Ψ_{1}}$ vs. rapidity for protons in three large centrality bins from only the backward region in $\sqrt{s_{NN}} = 3$ GeV Au+Au collisions...
Figure 8

10.17182/hepdata.144480.v2/t6

$v_{3} {Ψ_{1}}$ vs. $p_{T}$ for protons in three large centrality bins in $\sqrt{s_{NN}} = 3$ GeV Au+Au collisions at STAR. $v_{3} {Ψ_{1}}$ becomes increasingly...

Figure 3

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