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: tau_B+ = 1.624 +/- 0.014 (stat) +/- 0.018 (syst) ps tau_B0 = 1.531 +/- 0.021 (stat) +/- 0.031 (syst) ps tau_B+/tau_B0 = 1.060 +/- 0.021 (stat) +/- 0.024 (syst) and for the average b-hadron lifetime: tau_b = 1.570 +/- 0.005 (stat) +/- 0.008 (syst) ps.

J. ABDALLAH, P. ABREU, W. ADAM, P. ADZIC, T. ALBRECHT, T. ALDERWEIRELD, 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, 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

NAVARRIA, FRANCESCO LUIGI;PAIANO, SIMONE;PERROTTA, ANDREA;ROVELLI, TIZIANO;
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: tau_B+ = 1.624 +/- 0.014 (stat) +/- 0.018 (syst) ps tau_B0 = 1.531 +/- 0.021 (stat) +/- 0.031 (syst) ps tau_B+/tau_B0 = 1.060 +/- 0.021 (stat) +/- 0.024 (syst) and for the average b-hadron lifetime: tau_b = 1.570 +/- 0.005 (stat) +/- 0.008 (syst) ps.
2004
J. ABDALLAH, P. ABREU, W. ADAM, P. ADZIC, T. ALBRECHT, T. ALDERWEIRELD, 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, 307-324 [10.1140/epjc/s2004-01599-5].
J. ABDALLAH; P. ABREU; W. ADAM; P. ADZIC; T. ALBRECHT; T. ALDERWEIRELD; R. ALEMANY-FERNANDEZ; T. ALLMENDINGER; P.P. ALLPORT; U. AMALDI; N. AMAPANE; S....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/21197
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