Isospin dependence of the eta prime meson production in nucleon-nucleon collisions

TL;DR

This paper investigates the isospin dependence of eta prime meson production in nucleon-nucleon collisions to understand the meson's structure and reaction mechanisms, using preliminary experimental results from COSY-11.

Contribution

It presents the first measurement of eta prime production in proton-neutron collisions near threshold, exploring isospin effects and meson structure.

Findings

Preliminary cross section measurements for pn --> pn eta prime.

Comparison with pp --> pp eta prime data to analyze isospin effects.

Insights into the flavor-singlet and gluonium content of eta prime meson.

Abstract

A comparison of the close-to-threshold total cross section for the eta prime production in pp --> pp eta prime and pn --> pn eta prime reactions constitutes a tool to investigate the eta prime meson structure and the reaction mechanism in the channels of isospin I=0 and I=1 and may provide insight into the flavour-singlet (perhaps also into gluonium) content of the eta prime meson. In this contribution we present preliminary results of measurement of the quasi-free production of the eta prime meson in the proton-neutron collisions conducted using the COSY-11 facility.