"Figure 1, 54.4 GeV 0-10%" of "Measurement of the sixth-order cumulant of net-proton multiplicity distributions in Au+Au collisions at $\sqrt{s_{NN}}=$ 27, 54.4, and 200 GeV at RHIC"

Event by event net-proton multiplicity, $\Delta N_{p}$, distributions for Au+Au collisions at √sNN = 27, 54.4, and 200 GeV in 0-10% and 30-40% centralities at midrapidity (|y| < 0.5) for the transverse momentum range of 0.4 < $p_{T}$ (GeV/c) < 2.0. These distributions are normalized by the corresponding numbers of events and are not corrected for detector efficiencies. Statistical uncertainties are shown as vertical lines. The dashed lines show the Skellam distributions for each collision energy and centrality. The bottom panel shows the ratio of the data to the Skellam expectations.

Au+Au碰撞在核子-核子质心系能量√sNN = 27、54.4和200 GeV下，0-10%与30-40%中心度、中快度（|y| < 0.5）且横动量范围0.4 < p_T（GeV/c）< 2.0时的逐事件净质子多重性ΔNₚ分布。这些分布通过对应事件数归一化，且未对探测器效率进行修正。统计不确定性以竖线表示。虚线展示了各碰撞能量与中心度对应的Skellam分布（Skellam distribution）。底部面板呈现了数据与Skellam预期值的比值。