Are there three Xi(1950) states?

TL;DR

This paper investigates the existence of multiple $ ext{Xi}(1950)$ states around 1950 MeV, proposing three distinct resonances with different spin-parity assignments supported by experimental and theoretical evidence.

Contribution

The paper introduces a theoretical framework suggesting three separate $ ext{Xi}(1950)$ states with specific quantum numbers and decay channels, clarifying their possible identification.

Findings

Identification of three $ ext{Xi}(1950)$ states with distinct quantum numbers.

Proposed decay channels for detecting each state.

Theoretical support for multiple resonances in the 1900-2000 MeV region.

Abstract

Different experiments on hadron spectroscopy have long suspected the existence of several cascade states in the $1900-2000 {\rm MeV}$ region. They are usually labeled under the common name of $\Xi (1950)$. As we argue here, there are also theoretical reasons supporting the idea of several $\Xi (1950)$ resonances. In particular, we propose the existence of three $\Xi(1950)$ states: one of these states would be part of a spin-parity $(1/2)^{-}$ decuplet and the other two probably would belong to the $(5/2)^{+}$ and $(5/2)^{-}$ octets. We also identify which decay channels are the more appropriate for the detection of each of the previous states.