Study of the eta-prime meson structure, width and interactions with nucleons at COSY-11

TL;DR

This paper investigates the eta-prime meson's structure, interactions, and production in nucleon collisions, providing precise measurements of its width and insights into proton-meson interactions at COSY-11.

Contribution

It offers new high-precision measurements of the eta-prime meson's width and explores its production mechanisms and interactions with nucleons, advancing understanding of meson-nucleon dynamics.

Findings

Measured the eta-prime meson width with unprecedented precision.

Analyzed isospin dependence of eta-prime production cross sections.

Compared invariant mass distributions for different proton-meson reactions.

Abstract

We present results on the isospin dependence of the eta-prime production cross section in nucleon-nucleon collisions, as well as the results of comparative analysis of the invariant mass distributions for the pp-->pp eta-prime and pp-->pp eta reactions in the context of the proton-eta and proton-eta-prime interaction. Additionally, the value of the total width of the eta-prime is reported as derived directly from the measurement of the mass distribution and an explanation of the experimental technique used in order to achieve a precision about an order of magnitude better then former experiments is included.