[SLAC] [SLAC Pubs and Reports]

SLAC-PUB-7942
B+, B0d and b-Baryon Lifetimes

Abstract

We review recent B+, B0d and b-baryon lifetime measurements performed by the LEP, SLD and CDF collaborations. Lifetime ratios of tau(B+)/tau(B0d) = 1.070 +/- 0.027 and tau(b baryon)/tau(B0d) = 0.77 +/- 0.04 are obtained using all existing measurements. The ratio between charged and neutral B meson lifetimes is in good agreemetn with theory but the ratio between b-baryon and B meson lifetimes remains somewhat lower than expected.

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