On strange SU(3) partners of Theta+

TL;DR

This paper explores a mixing scenario between the Roper octet and an exotic antidecuplet of baryons, predicting the masses, widths, and decay properties of strange members, providing new insights into baryon structure.

Contribution

It introduces a novel mixing model between known and exotic baryons, predicting specific properties of strange baryons not previously detailed.

Findings

Predicted mass range for Sigma antidecuplet: 1795-1830 MeV

Estimated Xi antidecuplet mass: 1900-1970 MeV

Total widths for strange baryons: 10-30 MeV

Abstract

We propose a scenario in which Roper octet can mix with a putative antidecuplet of exotic baryons and predict the properties of its strange members. We show that 1795 MeV < M_Sigma_{\bar{10}} <1830 MeV and 1900 MeV < M_Xi_{\bar{10}}<1970 MeV. We also estimate total widths: 10 MeV < Gamma_\Sigma_{\bar{10}}< 30 MeV} and Gamma_\Xi_{\bar{10}}\sim 10 MeV and branching ratios for different decay modes.