Determination of the polarization in the $\vec{p}p\to pp$ reaction with WASA-at-COSY detector

TL;DR

This paper reports on measuring the polarization in the proton-proton to proton-proton-eta reaction using the WASA-at-COSY detector, providing insights into eta-meson production and nucleon interactions.

Contribution

It introduces a method for determining beam polarization in the pp o pp\u03b7 reaction with experimental results at specific beam momenta.

Findings

Successful measurement of beam polarization degree.

Method demonstrated with large acceptance and -symmetry.

Data at two different beam momenta.

Abstract

The dynamics of $\eta$-meson production and the interaction of $\eta$-mesons with nucleons can be studied using the $\vec{p}p\to pp\eta$ reaction via measurements of the analyzing power $A_{y}$. To this end, we have performed a measurement of the $\vec{p}p\to pp\eta$ reaction using the WASA-at-COSY detector, which provides large acceptance and is $\varphi$-symmetric. The experiment was carried out for beam momenta of $2026$ MeV/c and $2188$ MeV/c. In this article we present a method and results for the determination of the degree of the beam polarization.