Measurement of $\pi^0 \Lambda$, $\bar{K}^0 n$, and $\pi^0 \Sigma^0$ production in $K^- p$ interactions for $p_{K^-}$ between 514 and 750 MeV/$c$

TL;DR

This study measures differential cross sections and hyperon polarizations for specific particle productions in $K^- p$ interactions within 514-750 MeV/$c$, providing high-precision data for hyperon state analysis.

Contribution

It offers more precise measurements of hyperon production cross sections and polarizations, enabling detailed analysis of excited hyperon states in the studied energy range.

Findings

Enhanced precision over previous data

Detailed hyperon polarization measurements

Insights into hyperon excited states

Abstract

Differential cross sections and hyperon polarizations have been measured for $\bar{K}^0 n$, $\pi^0 \Lambda$, and $\pi^0 \Sigma^0$ production in $K^- p$ interactions at eight $K^-$ momenta between 514 and 750 MeV/$c$. The experiment detected the multiphoton final states with the Crystal Ball spectrometer using a $K^-$ beam from the Alternating Gradient Synchrotron of BNL. The results provide significantly greater precision than the existing data, allowing a detailed reexamination of the excited hyperon states in our energy range.