Abstract
We measure the mass difference, , between the and the using the decay chain with . The data were recorded with the BABAR detector at center-of-mass energies at and near the resonance, and correspond to an integrated luminosity of approximately . We measure . We combine this result with a previous BABAR measurement of to obtain . These results are compatible with and approximately five times more precise than the Particle Data Group averages.
- Received 30 July 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.202003
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