2003/11/01 by The DELPHI Collaboration, J. Abdallah · 3 citations
Computer Science · Physics and Astronomy · #Algorithms and Data Compression #Computational Physics and Python Applications #Particle physics theoretical and experimental studies #hep-ex
paper · pdf · doi:10.1140/epjc/s2003-01441-8
published as Eur.Phys.J.C32:185-208,2004 · 54 pages, 26 figures, Accepted by Eur. Phys. J. C
arxiv created 2003/11/01 · openalex publication_date 2004/01/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly.