An estimate of a lower bound on the masses of mirror baryons
  We consider the most favorable conditions to indirectly observe the mixing of ordinary and mirror hadrons in non-leptonic and weak radiative decays of hyperons. This allows us to set a lower bound on the masses of mirror baryons. This bound turns out to be impressively high, of the order of $10^6$GeV. 
A. Garcia (1), R. Huerta (2), and G. Sanchez-Colon (2)   ((1)CINVESTAV-IPN Unidad Zacatenco, (2)CINVESTAV-IPN Unidad Merida)