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Using events in which one of two neutral B mesons from the decay of an [Upsilon](4S) meson is fully reconstructed, the authors determine parameters governing de

Using events in which one of two neutral-B mesons from the decay of an [Upsilon](4S) resonance is fully reconstructed, we set limits on the difference between t

Using events in which one of two neutral B mesons from the decay of an [Upsilon](4S) resonance is fully reconstructed, they set limits on the lifetime differenc