Light nuclei collectivity from $\sqrt{s_{NN}}$ = 3 GeV Au+Au collisions at RHIC

The STAR collaboration
Phys.Lett.B 827 (2022) 136941, 2022.

Abstract
In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons. A breaking of this scaling and dominance of baryonic interactions is found for identified hadron collective flow measurements in $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au collisions. In this paper, we report measurements of the first- and second-order azimuthal anisotropic parameters, $v_1$ and $v_2$, of light nuclei ($d$, $t$, $^{3}$He, $^{4}$He) produced in $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au collisions at the STAR experiment. An atomic mass number scaling is found in the measured $v_1$ slopes of light nuclei at mid-rapidity. For the measured $v_2$ magnitude, a strong rapidity dependence is observed. Unlike $v_2$ at higher collision energies, the $v_2$ values at mid-rapidity for all light nuclei are negative and no scaling is observed with the atomic mass number. Calculations by the Jet AA Microscopic Transport Model (JAM), with baryonic mean-field plus nucleon coalescence, are in good agreement with our observations, implying baryonic interactions dominate the collective dynamics in 3 GeV Au+Au collisions at RHIC.

  • Figure 3a proton

    Data from Fig.3a (open squares)

    10.17182/hepdata.115569.v1/t1

    The rapidity and $p_{T}$ dependencies of $v_{1}$ for $p$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 3a deuteron

    Data from Fig.3a (solid circles)

    10.17182/hepdata.115569.v1/t2

    The rapidity and $p_{T}$ dependencies of $v_{1}$ for $d$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 3a triton (-0.1 < y < 0)

    Data from Fig.3a (solid squares (-0.1 < y < 0))

    10.17182/hepdata.115569.v1/t3

    The $p_{T}$ dependencies of $v_{1}$ within $-0.1<y<0$ for $t$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 3a triton (-0.4 < y < -0.1)

    Data from Fig.3a (solid squares (-0.2 < y < -0.1, -0.3 <y < -0.2, -0.4 < y <-0.3))

    10.17182/hepdata.115569.v1/t4

    The $p_{T}$ dependencies of $v_{1}$ within $-0.4<y<-0.1$ for $t$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 3a $^{3}$He

    Data from Fig.3a (crosses)

    10.17182/hepdata.115569.v1/t5

    The rapidity and $p_{T}$ dependencies of $v_{1}$ for $^{3}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 3a $^{4}$He (-0.1 < y < 0)

    Data from Fig.3a (triangles (-0.1 < y < 0))

    10.17182/hepdata.115569.v1/t6

    The $p_{T}$ dependencies of $v_{1}$ within $-0.1<y<0$ for $^4$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 3a $^{4}$He (-0.4 < y < -0.1)

    Data from Fig.3a (triangles (-0.2 < y < -0.1, -0.3 <y < -0.2, -0.4 < y <-0.3))

    10.17182/hepdata.115569.v1/t7

    The $p_{T}$ dependencies of $v_{1}$ within $-0.4<y<-0.1$ for $^{4}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 4(a-d) proton

    Data from upper panels of Fig.4 (open squares)

    10.17182/hepdata.115569.v1/t8

    The rapidity and $p_{T}$ dependencies of $v_{2}$ for $p$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 4(a-d) deuteron

    Data from upper panels of Fig.4 (solid circles)

    10.17182/hepdata.115569.v1/t9

    The rapidity and $p_{T}$ dependencies of $v_{2}$ for $d$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 4(a-d) triton (-0.1 < y < 0)

    Data from upper panels of Fig.4 (solid squares (-0.1 < y < 0))

    10.17182/hepdata.115569.v1/t10

    The $p_{T}$ dependencies of $v_{2}$ within $-0.1<y<0$ for $t$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 4(a-d) triton (-0.4 < y < -0.3)

    Data from upper panels of Fig.4 (solid squares (-0.2 < y < -0.1, -0.3 <y < -0.2, -0.4 < y <-0.3))

    10.17182/hepdata.115569.v1/t11

    The $p_{T}$ dependencies of $v_{2}$ within $-0.4<y<-0.1$ for $t$ in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 4(a-d) $^{3}$He

    Data from upper panels of Fig.4 (crosses)

    10.17182/hepdata.115569.v1/t12

    The rapidity and $p_{T}$ dependencies of $v_{2}$ for $^{3}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 4(a-d) $^{4}$He (-0.1 < y <0)

    Data from upper panels of Fig.4 (triangles (-0.1 < y < 0))

    10.17182/hepdata.115569.v1/t13

    The $p_{T}$ dependencies of $v_{2}$ within $-0.1<y<0$ for $^4$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 4(a-d) $^{4}$He (-0.4 < y < -0.1)

    Data from upper panels of Fig.4 (triangles (-0.2 < y < -0.1, -0.3 <y < -0.2, -0.4 < y <-0.3))

    10.17182/hepdata.115569.v1/t14

    The $p_{T}$ dependencies of $v_{2}$ within $-0.4<y<-0.1$ for $^{4}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 5a proton, deuteron, and $^{3}$He

    Data from upper panels of Fig.5a (open squares, solid circles and crosses)

    10.17182/hepdata.115569.v1/t15

    The rapidity dependencies of $v_{1}$ for $p$, $d$, and $^{3}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 5a triton and $^{4}$He

    Data from Fig.5a (solid squares and triangles)

    10.17182/hepdata.115569.v1/t16

    The rapidity dependencies of $v_{1}$ for $t$ and $^{4}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 5a model

    Model calculations in Fig.5a (line and bands)

    10.17182/hepdata.115569.v1/t17

    The rapidity dependencies of $v_{1}$ from JAM plus coalescence calculations in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 5b proton, deuteron, and $^{3}$He

    Data from Fig.5b (open squares, solid circles and crosses)

    10.17182/hepdata.115569.v1/t18

    The rapidity dependencies of $v_{2}$ for $p$, $d$, and $^{3}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 5b triton and $^{4}$He

    Data from Fig.5b (solid squares and triangles)

    10.17182/hepdata.115569.v1/t19

    The rapidity dependencies of $v_{2}$ for $t$ and $^{4}$He in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 5b model

    Model calculations in Fig.5b (line and bands)

    10.17182/hepdata.115569.v1/t20

    The rapidity dependencies of $v_{2}$ from JAM plus coalescence calculations in 10-40% mid-central Au+Au collisions at 3 GeV.

  • Figure 6 data

    Data from Fig.6

    10.17182/hepdata.115569.v1/t21

    Light nucleus scaled $v_{1}$ slopes as a function os collision energy in 10-40 mid-cantral Au+Au collisions.

  • Figure 6 model

    Model calculations in Fig.6

    10.17182/hepdata.115569.v1/t22

    Light nucleus scaled $v_{1}$ slopes from JAM plus coalescence in 10-40 mid-cantral Au+Au collisions at 3 GeV.

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