期刊
PHYSICS LETTERS B
卷 493, 期 3-4, 页码 266-280出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0370-2693(00)01145-X
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The lifetime and oscillation frequency of the B-0 meson has been measured using (B) over bar (0) --> D(*+)l(-)<()over bar> decays recorded on the Z(0) peak with the OPAL detector at LEP. The D*+ --> D(0)pi (+) decays were reconstructed using an inclusive technique and the production flavour of the B-0 mesons was determined using a combination of tags from the rest of the event. The results tau (B0) = 1.541 +/- 0.028 +/- 0.023 ps, Deltam(d) = 0.497 +/- 0.024 +/- 0.025 ps(-1) were obtained, where in each case the first error is statistical and the second is systematic. (C) 2000 Elsevier Science B.V. All rights reserved.
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