First observation of the Xi- pi+ decay mode of the Xi0(1690) hyperon

TL;DR

This paper reports the first observation of the Xi- pi+ decay mode of the Xi0(1690) hyperon, confirming its existence and providing new experimental data on its properties.

Contribution

It presents the first detection of the Xi- pi+ decay mode of Xi0(1690), expanding understanding of this hyperon's decay channels and resonance characteristics.

Findings

Confirmed the existence of Xi0(1690) in the Xi- pi+ decay mode

Measured the mass and width close to previous observations in other channels

Provided production cross section and branching ratio data

Abstract

We report the first observation of the Xi- pi+ decay mode of the Xi0(1690), confirming the existence of this resonance. The Xi0(1690) were produced by Sigma- of 345 Gev/c mean momentum in copper and carbon targets. The mass and width are close to those observed earlier for the Xi-(1690) in the Lambda K- decay channel. The product of inclusive production cross section and branching ratio is given relative to that of the Xi0(1530).