Measurement of the D*(2010)+D+ Mass Difference

J. P. Lees et al. (BABAR Collaboration)
Phys. Rev. Lett. 119, 202003 – Published 14 November 2017
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Abstract

We measure the mass difference, Δm+, between the D*(2010)+ and the D+ using the decay chain D*(2010)+D+π0 with D+Kπ+π+. The data were recorded with the BABAR detector at center-of-mass energies at and near the ϒ(4S) resonance, and correspond to an integrated luminosity of approximately 468fb1. We measure Δm+=(140601.0±6.8[stat]±12.9[syst])keV. We combine this result with a previous BABAR measurement of Δm0m(D*(2010)+)m(D0) to obtain ΔmD=m(D+)m(D0)=(4824.9±6.8[stat]±12.9[syst])  keV. These results are compatible with and approximately five times more precise than the Particle Data Group averages.

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  • Received 30 July 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.202003

© 2017 American Physical Society

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Particles & Fields

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Vol. 119, Iss. 20 — 17 November 2017

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