Paper detail

Are there three Xi(1950) states?

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 $Ξ(1950)$. As we argue here, there are also theoretical reasons supporting the idea of several $Ξ(1950)$ resonances. In particular, we propose the existence of three $Ξ(1950)$ 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.