  Typical experimental measurements do not separate the contributions of Sigma
state decays from (anti)Lambda yields. An ongoing analysis in STAR is resolving
the contribution from excited Sigma states, but the primary contribution comes
from electromagnetic decays of the (anti)Sigma0.
  Photon conversions into e+e- pairs in detector material have been used by
STAR to identify photons from pi0 decays. A similar technique has been used
here to identify photons from (anti)Sigma0 decays in conjunction with STAR's
excellent PID capabilities for finding the associated (anti)Lambda daughters.
We report here on progress toward measuring the (anti)Sigma0 yields in various
nuclear collisions at RHIC.
