2005/01/22 by S. Shulga, Shulga, S.
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0501207
41 pages, 3 figures, 8 Tables, Submit. to Comp.Phys.Commun., January, 2005
arxiv created 2005/01/22 · openalex publication_date 2005/01/22 · arxiv updated 2009/12/01 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
C++ package \tt BtoVVana is aimed to extract physics parameters in decays of the scalar neutral B-meson to two vector particles in the intermediate state, and two leptons and two pseudoscalar mesons in the final state. Improved angular moments method is implemented in the package \tt BtoVVana: the method uses the time dependent weighting functions and time-integrated observables with variable upper time limit. These observables allow to keep full time informative contents of the decay. By using the package \tt BtoVVana it was shown that the statistical errors of extraction of the observables strongly depends on the choice of the angular weighting functions. The best angular weighting functions, which are the linear combinations of the amplitude angular functions, are implemented in the package \tt BtoVVana. The first version of the program contains algorithms to extract physics parameters in the case of untagged decays. The package \tt BtoVVana and program codes for the channels Bs0→ J/ψϕ and Bd0→ J/ψK^* in the Monte Carlo generator \tt SIMUB were written in parallel and mutually tested with high precision.