The Monte Carlo program KORALZ version 4.0 for lepton or quark pair production at LEP/SLC energies

Published: 01-01-1994| Version 1 | DOI: 10.17632/n4dt3py3xb.1
S. Jadach,
B.F.L. Ward,
Z. Wa̧s


Abstract A Monte Carlo program for τ pair production and decay applicable to the experiments in e^+ e^-colliders in the Z resonance energy range is presented. The program includes initial and final state bremsstrahlung corrections up to the O(α^2 ) (with exclusive exponentiation), and O(α) electroweak corrections. More than twenty distinct τ decay modes can be generated: (a) leptonic modes τ^- →v̄ve^- (γ) and v̄vμ^- (γ); (b) one-meson modes, vπ^-and vK^- ; (c) two-me son modes, ν{π^-π^0 }_(ρ^- )... Title of program: KORALZ, VERSION 4.0 Catalogue Id: ACBK_v2_0 [ACTI] Nature of problem Spin polarization of the tau in the process e+e- -> tau+tau-(etagamma), tau+- -> X+- is used as an important data point for precise tests of the standard electroweak theory. The effects due to QED bremsstrahlung and apparatus efficiency have to be subtracted from the data. The program may also be applied for the production of u, d, s, c, b quarks and neutrinos after appropriate redefinition of the coupling constants and massess. It may be used, as well, to simulate the muon pair production proce ... Versions of this program held in the CPC repository in Mendeley Data ACBK_v2_0; KORALZ, VERSION 4.0; 10.1016/0010-4655(94)90190-2 ACBK_v3_0; KORALZ, version 4.04; 10.1016/S0010-4655(99)00437-3 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)