Σc(++) and Σc(0) production from e(+)e(-) annihilation in the Υ energy region

We have observed ..sigma../sub c//sup ++/ and ..sigma../sub c//sup 0/ baryons in nonresonant e/sup +/e/sup -/ interactions through their decays to ..lambda../sub c//sup +/..pi../sup +- / using the CLEO detector. The mass difference M(..sigma../sub c//sup ++/)-M(..lambda../sub c//sup +/) is measured to be 167.8 +- 0.4 +- 0.3 MeV; for M(..sigma../sub c//sup 0/)-M(..lambda../sub c//sup +/) we find 167.9 +- 0.5 +- 0.3 MeV. ..sigma../sub c/ decay accounts for (18 +- 3 +- 5)% of ..lambda../sub c//sup +/ production.