Are there three Xi(1950) states?

Abstract

Different experiments on hadron spectroscopy have long suspected the existence of several cascade states in the $1900-2000\mathrm{MeV}$ 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.

Comments: 5 pages, 3 tables, final version. Published in Phys. Rev. D 85, 017502 (2012)