# Centrality in hadron collisions

## TL;DR

This paper discusses the emergence of reflective scattering in high-energy hadron collisions, which affects the impact parameter distribution and challenges the direct application of nuclear centrality concepts to hadron interactions.

## Contribution

It introduces a modified centrality framework for hadron collisions accounting for reflective scattering effects at high energies.

## Key findings

- Reflective scattering becomes significant at LHC energies and beyond.
- Inelastic probability distribution shifts towards peripheral impact parameters.
- The traditional nuclear centrality definition requires modification for hadron interactions.

## Abstract

In hadron interactions at the LHC energies, the reflective scattering mode starts to play a role which is expected to be even a more significant beyond the energies of the LHC. This new but still arguable phenomenon implies a peripheral dependence of the inelastic probability distribution in the impact parameter space and asymptotically evolving to the black ring. As a consequence, the straightforward extension to hadrons of the centrality definition adopted for nuclei needs to be modified.