Precision measurement of the Λc+ baryon mass -: art. no. 052006

The Lambda(+)(c) baryon mass is measured using Lambda(+)(c)->Lambda(KSK+)-K-0 and Lambda(+)(c)->Sigma(KSK+)-K-0-K-0 decays reconstructed in 232 fb(-1) of data collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) storage ring. The Lambda(+)(c) mass is measured to be 2286.46 +/- 0.14 MeV/c(2). The dominant systematic uncertainties arise from the amount of material in the tracking volume and from the magnetic field strength.