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 Z0 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: τB+ = 1.624±0.014 (stat)±0.018 (syst)ps τB0 = 1.531±0.021 (stat)±0.031 (syst) ps τ B+/τB0 = 1.060±0.021 (stat)±0.024 (syst) and for the average b-hadron lifetime: τb = 1.570±0.005 (stat)±0.008 (syst) ps.

Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2004). A precise measurement of the B+, B0 and mean b-hadron lifetime with the DELPHI detector at LEP I. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 33(3), 307-324 [10.1140/epjc/s2004-01599-5].

A precise measurement of the B+, B0 and mean b-hadron lifetime with the DELPHI detector at LEP I

CALVI, MARTA;PAGANONI, MARCO;TABARELLI DE FATIS, TOMMASO;
2004

Abstract

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 Z0 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: τB+ = 1.624±0.014 (stat)±0.018 (syst)ps τB0 = 1.531±0.021 (stat)±0.031 (syst) ps τ B+/τB0 = 1.060±0.021 (stat)±0.024 (syst) and for the average b-hadron lifetime: τb = 1.570±0.005 (stat)±0.008 (syst) ps.
Articolo in rivista - Articolo scientifico
Engineering (miscellaneous); Physics and Astronomy (miscellaneous)
English
2004
33
3
307
324
none
Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2004). A precise measurement of the B+, B0 and mean b-hadron lifetime with the DELPHI detector at LEP I. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 33(3), 307-324 [10.1140/epjc/s2004-01599-5].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/155917
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