2004/01/16 by The DELPHI Collaboration, J. Abdallah
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1140/epjc/s2004-01599-5
published as Eur.Phys.J.C33:307-324,2004 · 30 pages, 10 figures, Accepted by Eur. Phys. J. C
arxiv created 2004/01/16 · openalex publication_date 2004/03/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
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: tauB+ = 1.624 +/- 0.014 (stat) +/- 0.018 (syst) ps tauB0 = 1.531 +/- 0.021 (stat) +/- 0.031 (syst) ps tauB+/tauB0 = 1.060 +/- 0.021 (stat) +/- 0.024 (syst) and for the average b-hadron lifetime: taub = 1.570 +/- 0.005 (stat) +/- 0.008 (syst) ps.