Michael Sokoloff (University of Cincinnati)
We present a high precision measurement of the mass difference between the D*(2010)+ and D+ mesons using the decay chain D*(2010)+ -> D+ pi0, with D+ -> K- pi+ pi+ . The analysis has been performed on a data sample corresponding to an integrated luminosity of about 477 fb-1, collected with the BABAR detector at the PEP-II e+e- collider. We additionally combine this result with a previous BABAR measurement of m(D*(2010)+) - m(D0) to extract the mass difference between the charged and neutral D mesons. We obtain results that are approximately seven times more precise than the present world averages.