Revision of results on $\Upsilon(1S)$, $\Upsilon(2S)$, and $\Upsilon(3S)$ masses

TL;DR

This paper revisits and corrects the historical measurements of the masses of the bottomonium states $
S$, $S$, and $S$, addressing previous methodological shortcomings to improve accuracy.

Contribution

It provides revised mass values for the bottomonium states by correcting past experimental procedures and accounting for previously ignored effects.

Findings

Corrected mass values differ by 0.1 to 0.4 MeV from original measurements.

Discrepancy between CESR and VEPP-4 results on $
S$ mass reduced from 3.3 to 1.8 standard deviations.

Enhanced consistency among experimental results after corrections.

Abstract

We have reconsidered the results on the masses of the narrow bottomonium states $\Upsilon(1S)$--$\Upsilon(3S)$ obtained in 1982--1986 at CESR, DORIS and VEPP-4 colliders in order to fix shortcomings of the mass determination procedures. For experiments at CESR and DORIS this includes the incorrect accounting of the radiative corrections and usage of the electron mass value revised in 1986. In analyses of all experiments the interference of the resonance production and the nonresonant process was ignored. The corrected mass values for five experiments are suggested. The corrections vary from 0.1 to 0.4~MeV. The discrepancy between CESR and \mbox{VEPP-4} results on $\Upsilon(1S)$ mass has been reduced from 3.3 to 1.8 standard deviations.