What Can We Learn from (Pseudo)Rapidity Distribution in High Energy Collisions?

Figure 1

Rapidity and pseudorapidity distributions of negatively charged pions produced in (a) 158, (b) 80, (c) 40, and (d) 20 GeV/c 𝑝𝑝 collisions. The two-dotted curves represent the rapidity distribution range of the NA61/SHINE experiment [1]. The solid and dashed curves are our modelling results on the rapidity and pseudorapidity distributions.

(a) 158 GeV/c 𝑝𝑝, 𝜋⁻

(b) 80 GeV/c 𝑝𝑝, 𝜋⁻

(c) 40 GeV/c 𝑝𝑝, 𝜋⁻

(d) 20 GeV/c 𝑝𝑝, 𝜋⁻