Extended Data Fig. 4: ϕ-meson ρ00 obtained from first-order and second-order event planes.
From: Pattern of global spin alignment of ϕ and K*0 mesons in heavy-ion collisions
The red stars (grey squares) show the ϕ-meson ρ00 as a function of beam energy, obtained with the second-order (first-order) event plane.
