$N\bar N$ Scattering at NLO Order in An Effective Theory

TL;DR

This paper develops an effective theory framework for near-threshold nucleon-antinucleon ($Nar N$) scattering, incorporating next-to-leading order corrections, and demonstrates its success in fitting experimental data.

Contribution

It introduces a novel effective theory approach for $Nar N$ interactions at NLO, extending methods used for $NN$ systems.

Findings

Effective theory accurately describes experimental $Nar N$ scattering data.

NLO corrections improve the theoretical fit near the threshold.

The approach provides a systematic way to analyze $Nar N$ interactions.

Abstract

We have proposed to use an effective theory to describe interactions of an $N\bar N$-system. The effective theory can be constructed in analogy to the existing effective theory for an $NN$-system. In this work we study the next-to-leading order correction to $N\bar N$ scattering near the threshold in the effective theory. We find that the experimental data can be well described with the effective theory.