Measurement of the average lifetime of B hadrons

1989
The average lifetime of B hadronsproduced in hadronicZ0 decays has been measured with the DELPHIdetector at LEP. The measurement is based on the analysis of the impact parameterdistributions of high pt muons and hadrons. The resulting mean B lifetimes are τB=(1.30±0.10±0.08)ps and τB=(1.27±0.04±0.12)ps respectively, giving a combined value of τB=(1.28±0.10)ps. The hadronicsample was also used to measure the partial Z0 width {Mathematical expression} and gave a value of 0.222-0.031+0.033±0.017. © 1992 Springer-Verlag.
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