B-meson decays to final states consisting of a D⁰ or D^*± and one or two charged pions have been observed. The charged-B mass is 5270.8 ±{} 2.3 ±{} 2.0 MeV and the neutral-B mass is 5274.2 ±{} 1.9 ±{} 2.0 MeV.
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Behrends et al. (1983) studied this question.
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