"Figure 5" of "Transverse single spin asymmetries of forward neutrons in $p+p$, $p+$Al and $p+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV as a function of transverse and longitudinal momenta"

Forward neutron single spin asymmetries in p+p, p+Al and p+Au collisions as a function of pT in bins of xF without hard collision activity

质子-质子(p+p)、质子-铝(p+Al)与质子-金(p+Au)碰撞中的前向中子(Forward neutron)单自旋不对称性，该物理量在费恩曼x(xF)分箱下随横向动量(pT)变化，且不涉及硬碰撞过程。