Spectral ratio: an observable to determine $K^{+}$ nucleus potential and $K^{+}$ N scattering cross section

TL;DR

This paper proposes using the spectral ratio of $K^{+}$ mesons at low transverse momentum across different symmetric nuclear systems as an observable to determine the $K^{+}$ nucleus potential and scattering cross section.

Contribution

It introduces the spectral ratio as a novel observable for extracting $K^{+}$ interaction parameters in nuclear matter.

Findings

Spectral ratio effectively distinguishes different $K^{+}$ potentials.

The method provides a new way to measure $K^{+}$ N scattering cross section.

Applicable to symmetric nuclear systems of varying sizes.

Abstract

Here we aim to show that the ratio of the momentum spectra of $K^{+}$ at small transverse momentum measured for symmetric systems of different sizes can be such an observable.