Evidence for flow in pPb collisions at 5 TeV from v2 mass splitting

TL;DR

This paper demonstrates that fluid dynamics can quantitatively explain the mass-dependent elliptic flow observed in pPb collisions at 5 TeV, supporting the presence of a fluid-like expansion in these small collision systems.

Contribution

It provides the first quantitative evidence that fluid dynamical models can describe mass splitting of v2 in pPb collisions at 5 TeV.

Findings

Fluid dynamical models match observed v2 mass splitting.

Supports the existence of a fluid-like expansion in pPb collisions.

Strengthens the case for collective behavior in small systems.

Abstract

We show that a fluid dynamical scenario describes quantitatively the observed mass splitting of the elliptical flow coefficients v2 for pions, kaons, and protons. This provides a strong argument in favor of the existence of a fluid dynamical expansion in pPb collisions at 5TeV.