Pomeron Odderon interference in production of two pi+ pi- pairs at LHC and ILC

TL;DR

This paper explores detecting the perturbative Odderon through two pion pair production in photon collisions at high energies, proposing methods for observation at LHC and ILC, with a focus on charge asymmetries and generalized distribution amplitudes.

Contribution

It introduces a novel approach to identify the Odderon via charge asymmetries in pion pair production, utilizing kT-factorization and generalized distribution amplitudes.

Findings

Charge asymmetries can signal Odderon presence.

Ultraperipheral LHC collisions face background challenges.

ILC offers a cleaner environment for this physics.

Abstract

We propose to look for the Odderon through the production of two pion pairs in photon collisions at high energies. We calculate the corresponding matrix elements in kT-factorization and discuss the possibility to reveal the existence of the perturbative Odderon by charge asymmetries, relying on models for the generalized distribution amplitudes of pi+ pi-. The application of this strategy to ultraperipheral collisions at the LHC suffers from the difficulty to trigger on interesting events and is plagued with severe background problems in p-p mode. Electron - positron colliders like ILC seem to better suit this physics.