Mass Differences of Charmed Hadrons

Abstract

The mass difference $m\left(D^{+}\right)-m\left(D^0\right)$ of the charmed pseudoscalar meson doublet is estimated as about 6.7 MeV, as compared with the value 15 MeV given by De Rújula, Georgi, and Glashow. Mass differences are also estimated for charmed baryons.