Close to threshold eta' meson production in proton-proton collisions at COSY-11

TL;DR

This paper summarizes recent precise measurements of eta' meson production cross sections in proton-proton collisions at COSY-11, contributing to the understanding of eta'-N interactions and bound state searches.

Contribution

It provides new, precise experimental data on eta' production cross sections, enhancing knowledge of eta'-N interactions and aiding bound state investigations.

Findings

Precise eta' production cross section measurements at COSY-11.

First estimation of eta'-N interaction from excitation function.

Support for ongoing eta' bound state searches.

Abstract

Intensive quest for the eta and eta' bound states is currently ongoing at both theoretical and experimental levels e.g. at COSY, ELSA, GSI, JINR, JPARC, LPI, and MAMI. These studies were already supported by data provided by the COSY-11 collaboration including determination of the total width of the eta' meson. In addition, the first rough estimation of the eta'-N interaction from the excitation function of the cross section for the pp-->pp eta' reaction was also performed. Recent precise measurement in this field from the COSY-11 experiment allows to summarize results on the eta' meson production cross section in proton-proton collisions at COSY-11.