Pomeron universality from identical pion correlations

TL;DR

This paper investigates Bose-Einstein correlations of identical pions in high-energy proton-proton collisions at the LHC, providing evidence for the universal structure of Pomeron exchange and revealing that the emission source size depends on event multiplicity.

Contribution

It demonstrates that the Pomeron exchange mechanism exhibits universality across different energies and event multiplicities, based on pion correlation measurements.

Findings

Source size depends on multiplicity, not energy.

One-Pomeron exchange source is smaller than the proton.

Supports universal Pomeron exchange structure.

Abstract

Bose-Einstein correlations of identical pions produced in high-energy pp collisions at the LHC allow a probe of the Pomeron exchange mechanism. The size of the domain which emits the pions depends on the multiplicity of events, but not on the collider energy. This confirms the universal structure of Pomeron exchange. The data at relatively low multiplicities indicate that the size of the source created by one-Pomeron exchange is much less than the size of the proton.