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arXiv · 0805.0497

Measurement of the Mass Difference m(B0) - m(B+)

The BABAR Collaboration·B. Aubert
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Abstract

Using 230 million B Bbar events recorded with the BABAR detector at the e+ e- storage rings PEP-II, we reconstruct approximately 4100 B0 to J/psi K+ pi- and 9930 B+ to J/psi K+ decays with J/psi to mu+ mu- and e+ e-. From the measured B-momentum distributions in the e+ e- rest frame, we determine the mass difference m(B0) - m(B+) = (+0.33 +- 0.05 +- 0.03) MeV/c^2.

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The BABAR Collaboration, B. Aubert. 2008-07-18. Measurement of the Mass Difference m(B0) - m(B+). https://doi.org/10.1103/physrevd.78.011103

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