Measurement of $J/\psi$ at forward and backward rapidity in $p+p$, $p+A$l, $p+A$u, and $^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200~{\rm GeV}$

The PHENIX collaboration
Phys.Rev.C 102 (2020) 014902, 2020.

Abstract (data abstract)
BNL-RHIC. Charmonium is a valuable probe in heavy-ion collisions to study the properties of the quark gluon plasma, and is also an interesting probe in small collision systems to study cold nuclear matter effects, which are also present in large collision systems. With the recent observations of collective behavior of produced particles in small system collisions, measurements of the modification of charmonium in small systems have become increasingly relevant. We present the results of $J$$/$$\psi$ measurements at forward and backward rapidity in various small collision systems, $p$$+$$p$, $p$$+$Al, $p$$+$Au and $^3$He$+$Au, at $\sqrt{s_{NN}}$=200GeV. The results are presented in the form of the observable $R_{AB}$, the nuclear modification factor, a measure of the ratio of the $J/\psi$ invariant yield compared to the scaled yield in $p+p$ collisions. We examine the rapidity, transverse momentum, and collision centrality dependence of nuclear effects on $J/\psi$ production with different projectile sizes $p$ and $^3$He, and different target sizes Al and Au. The modification is found to be strongly dependent on the target size, but to be very similar for $p$$+$Au and $^{3}$He$+$Au. However, for 0%—20% central collisions at backward rapidity, the modification factor for $^{3}$He$+$Au is found to be smaller than that for $p$$+$Au, with a mean fit to the ratio of $0.89\pm0.03$(stat)${\pm}0.08$(syst), possibly indicating final state effects due to the larger projectile size.

  • Table 1

    Data from Fig. 4 of Measurement of $J/\psi$ at forward and backward rapidity in $p$+$p$, $p$$+$Al, $p$$+$Au, and $^3$He+Au collisions at $\sqrt{s_{_{NN}}}=200~{\rm GeV}$ (PRC 102.014902)

    10.17182/hepdata.98626.v1/t1

    J/psi invariant yields in p+p collisions as a function of pT at forward and backward rapidity. The statistical and systematic...

  • Table 2

    Data from Fig. 5 of PRC 102.014902

    10.17182/hepdata.98626.v1/t2

    J/psi nuclear modification in p+Al, p+Au and 3He+Au collisions as a function of centrality and rapidity. The statistical and systematic...

  • Table 3

    Data from Figs. 5 and 6 of PRC 102.014902

    10.17182/hepdata.98626.v1/t3

    J/psi nuclear modification in p+Al collisions as a function of centrality and rapidity. The statistical and systematic uncertainties vary point-to-point...

  • Table 4

    Data from Figs. 5 and 7 of PRC 102.014902

    10.17182/hepdata.98626.v1/t4

    J/psi nuclear modification in p+Au collisions as a function of centrality and rapidity. The statistical and systematic uncertainties vary point-to-point...

  • Table 5

    Data from Figs. 5 and 8 of PRC 102.014902

    10.17182/hepdata.98626.v1/t5

    J/psi nuclear modification in 3He+Au collisions as a function of centrality and rapidity. The statistical and systematic uncertainties vary point-to-point...

  • Table 6

    Data from Figs. 9 and 10 of PRC 102.014902

    10.17182/hepdata.98626.v1/t6

    J/psi nuclear modification in p+Al MinBias collisions as a function of pT. The statistical and systematic uncertainties vary point-to-point and...

  • Table 7

    Data from Figs. 9 and 10 of PRC 102.014902

    10.17182/hepdata.98626.v1/t7

    J/psi nuclear modification in p+Au MinBias collisions as a function of pT. The statistical and systematic uncertainties vary point-to-point and...

  • Table 8

    Data from Figs. 9 and 10 of PRC 102.014902

    10.17182/hepdata.98626.v1/t8

    J/psi nuclear modification in 3He+Au MInBias collisions as a function of pT. The statistical and systematic uncertainties vary point-to-point and...

  • Table 9

    Data from Fig. 11 of PRC 102.014902

    10.17182/hepdata.98626.v1/t9

    J/psi nuclear modification in p+Al collisions as a function of pT and centrality at backward rapidity. The statistical and systematic...

  • Table 10

    Data from Fig. 11 of PRC 102.014902

    10.17182/hepdata.98626.v1/t10

    J/psi nuclear modification in p+Al collisions as a function of pT and centrality at forward rapidity. The statistical and systematic...

  • Table 11

    Data from Fig. 12 of PRC 102.014902

    10.17182/hepdata.98626.v1/t11

    J/psi nuclear modification in p+Au collisions as a function of pT and centrality at backward rapidity. The statistical and systematic...

  • Table 12

    Data from Fig. 13 of PRC 102.014902

    10.17182/hepdata.98626.v1/t12

    J/psi nuclear modification in p+Au collisions as a function of pT and centrality at forward rapidity. The statistical and systematic...

  • Table 13

    Data from Fig. 14 of PRC 102.014902

    10.17182/hepdata.98626.v1/t13

    J/psi nuclear modification in 3He+Au collisions as a function of pT and centrality at backward rapidity. The statistical and systematic...

  • Table 14

    Data from Fig. 14 of PRC 102.014902

    10.17182/hepdata.98626.v1/t14

    J/psi nuclear modification in 3He+Au collisions as a function of pT and centrality at forward rapidity. The statistical and systematic...

  • Table 15

    Data from Fig. 15 of PRC 102.014902

    10.17182/hepdata.98626.v1/t15

    J/psi nuclear modification in p+Al most central collisions as a function of pT is directly compared with p+Au collisions (Data...

  • Table 16

    Data from Fig. 16 of PRC 102.014902

    10.17182/hepdata.98626.v1/t16

    J/psi nuclear modification in d+Au and p+Au most central collisions as a function of pT is directly compared at forward...

  • Table 17

    Data from Fig. 17 of PRC 102.014902

    10.17182/hepdata.98626.v1/t17

    J/psi nuclear modification in 3He+Au most central collisions as a function of pT is directly compared to p+Au collisions (Data...

  • Table 18

    Data from Fig. 18 of PRC 102.014902

    10.17182/hepdata.98626.v1/t18

    J/psi nuclear modification in p+Al as a function of N_coll. The statistical and systematic uncertainties vary point-to-point and are listed...

  • Table 19

    Data from Figs. 18 and 19 of PRC 102.014902

    10.17182/hepdata.98626.v1/t19

    J/psi nuclear modification in p+Au collisions as a function of N_coll. The statistical and systematic uncertainties vary point-to-point and are...

  • Table 20

    Data from Fig. 18 of PRC 102.014902

    10.17182/hepdata.98626.v1/t20

    J/psi nuclear modification in 3He+Au as a function of N_coll. The statistical and systematic uncertainties vary point-to-point and are listed...

  • Table 21

    Data from Fig. 20 of PRC 102.014902

    10.17182/hepdata.98626.v1/t21

    J/psi nuclear modification in p+Al collisions as a function of nuclear thickness (T_A). The statistical and systematic uncertainties vary point-to-point...

  • Table 22

    Data from Fig. 20 of PRC 102.014902

    10.17182/hepdata.98626.v1/t22

    J/psi nuclear modification in p+Au collisions as a function of nuclear thickness (T_A). The statistical and systematic uncertainties vary point-to-point...

  • Table 23

    Data from Fig. 20 of PRC 102.014902

    10.17182/hepdata.98626.v1/t23

    J/psi nuclear modification in 3He+Au collisions as a function of nuclear thickness (T_A). The statistical and systematic uncertainties vary point-to-point...

  • Table 24

    Data from Fig. 21 of PRC 102.014902

    10.17182/hepdata.98626.v1/t24

    J/psi mean pT squared in p+Al collisions as a function of N_coll. The statistical and systematic uncertainties vary point-to-point and...

  • Table 25

    Data from Fig. 21 of PRC 102.014902

    10.17182/hepdata.98626.v1/t25

    J/psi mean pT squared in p+Au collisions as a function of N_coll. The statistical and systematic uncertainties vary point-to-point and...

  • Table 26

    Data from Fig. 21 of PRC 102.014902

    10.17182/hepdata.98626.v1/t26

    J/psi mean pT squared in 3He+Au collisions as a function of N_coll. The statistical and systematic uncertainties vary point-to-point and...

  • Table 27

    Data from Fig. 22 of PRC 102.014902

    10.17182/hepdata.98626.v1/t27

    J/psi invariant yields as a function of rapidity in small systems. The statistical and systematic uncertainties vary point-to-point and are...

  • Table 28

    Data from Fig. 23 of PRC 102.014902

    10.17182/hepdata.98626.v1/t28

    J/psi invariant yields in p+Al collisions as a function of centrality and rapidity. The statistical and systematic uncertainties vary point-to-point...

  • Table 29

    Data from Fig. 24 of PRC 102.014902

    10.17182/hepdata.98626.v1/t29

    J/psi invariant yields in p+Au collisions as a function of centrality and apidity. The statistical and systematic uncertainties vary point-to-point...

  • Table 30

    Data from Fig. 25 of PRC 102.014902

    10.17182/hepdata.98626.v1/t30

    J/psi invariant yields in 3He+Au collisions as a function of centrality and rapidity. The statistical and systematic uncertainties vary point-to-point...

  • Table 31

    Data from Fig. 26 of PRC 102.014902

    10.17182/hepdata.98626.v1/t31

    J/psi invariant yields in p+Al collisions as a function of pT and centrality at forward rapidity. The statistical and systematic...

  • Table 32

    Data from Fig. 26 of PRC 102.014902

    10.17182/hepdata.98626.v1/t32

    J/psi invariant yields in p+Al collisions as a function of pT and centrality at backward rapidity. The statistical and systematic...

  • Table 33

    Data from Fig. 27 of PRC 102.014902

    10.17182/hepdata.98626.v1/t33

    J/psi invariant yields in p+Au collisions as a function of pT and centrality at forward rapidity. The statistical and systematic...

  • Table 34

    Data from Fig. 27 of PRC 102.014902

    10.17182/hepdata.98626.v1/t34

    J/psi invariant yields in p+Au collisions as a function of pT and centrality at backward rapidity. The statistical and systematic...

  • Table 35

    Data from Fig. 28 of PRC 102.014902

    10.17182/hepdata.98626.v1/t35

    J/psi invariant yields in 3He+Au collisions as a function of pT and centrality at forward rapidity. The statistical and systematic...

  • Table 36

    Data from Fig. 28 of PRC 102.014902

    10.17182/hepdata.98626.v1/t36

    J/psi invariant yields in 3He+Au collisions as a function of pT and centrality at backward rapidity. The statistical and systematic...

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