High Precision Mass Measurements in $\Psi$ and ${\rm Y}$ Families Revisited

Abstract

High precision mass measurements in $\Psi$ and ${\rm Y}$ families performed in 1980-1984 at the VEPP-4 collider with OLYA and MD-1 detectors are revisited. The corrections for the new value of the electron mass are presented. The effect of the updated radiative corrections has been calculated for the $J/\Psi (1S)$ and $\Psi (2S)$ mass measurements.

5 pages, 1 table, submitted to Phys. Lett. B

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