A baryon decays strongly into + and + , but not

A baryon decays strongly into Σ⁺π^– and Σ^–π⁺, but not into Σ⁰π⁰ nor into Σ⁺π⁺, even if all are energetically possible. (1) What can you tell about its isospin? (2) You should check your conclusion looking at the ratio between the widths in the two observed channels. Neglecting phase-space differences, which is the value you expect?