Eur. Phys. J. C (2004) 33: 307-324
https://doi.org/10.1140/epjc/s2004-01599-5
https://doi.org/10.1140/epjc/s2004-01599-5
experimental physics
A precise measurement of the B + , B0 and mean b-hadron lifetime with the DELPHI detector at LEP I
Final results from the DELPHI Collaboration on the lifetime of B + and B0 mesons and the mean b-hadron lifetime, are presented using the data collected at the Z
0 peak in 1994 and 1995. Elaborate, inclusive, secondary vertexing methods have been employed to ensure a b-hadron reconstruction with good efficiency. To separate samples of B + and B0 mesons, high performance neural network techniques are used that achieve very high purity signals. The results obtained are: 
and for the average b-hadron lifetime: 
© Springer-Verlag, 2004
