Searching for hidden matter with long-range angular correlations at $e^+e^-$ colliders

TL;DR

This paper suggests that long-range azimuthal and rapidity correlations in $e^+e^-$ collisions could indicate new physics beyond the Standard Model, with ridge structures serving as potential signatures at future colliders.

Contribution

It demonstrates, using PYTHIA8 simulations, that a new stage of matter can enhance correlations, providing a novel method to search for hidden particles at $e^+e^-$ colliders.

Findings

Enhanced azimuthal and rapidity correlations due to new matter stage

Ridge structures similar to LHC observations appear in simulations

Potential signatures of new physics at future $e^+e^-$ colliders

Abstract

The analysis of azimuthal correlations in multiparticle production can be useful to uncover the existence of new physics beyond the Standard Model, e.g., Hidden Valley, in $e^+e^-$ annihilation at high energies. In this paper, based on previous theoretical studies and using PYTHIA8 event generator, it is found that both azimuthal and rapidity long-range correlations are enhanced due to the presence of a new stage of matter on top of the QCD partonic cascade. Ridge structures, similar to those observed at the LHC, show up providing a possible signature of new physics at future $e^+e^-$ colliders.