Elsevier Science Home
Computer Physics Communications Program Library
Full text online from Science Direct
Programs in Physics & Physical Chemistry
CPC Home

[Licence| Download | New Version Template] adkz_v1_0.tar.gz(1544 Kbytes)
Manuscript Title: Library of anomalous tautaugamma couplings for tau+tau-(etagamma) Monte Carlo programs.
Authors: T. Paul, J. Swain, Z. Was
Program title: TTGlib, version 2.0
Catalogue identifier: ADKZ_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 124(2000)243
Programming language: Fortran.
Operating system: UNIX, HP-UX 10.2.
RAM: 1M words
Word size: 32
Keywords: Particle physics, Elementary, Event simulation, Radiative corrections, Heavy lepton tau, Monte carlo simulation, Electrodynamics quantum, Spin polarization, Electroweak theory, Anomalous couplings.
Classification: 11.2.

Nature of problem:
The process e+e- -> tau+tau-(etagamma), tau+- -> X+- provides important observables, which are sensitive to parameters of the standard electroweak theory as well as possible effects of new physics. A Monte Carlo simulation of this process is necessary in order to evaluate the effects of the experimental apparatus and QED bremsstrahlung on the observables in question. Simultaneous control of the precise Standard Model predictions and contributions due to hypotethical new physics exptensions is mandatory in such studies.

Solution method:
The Monte Carlo simulation of tau+tau-(etagamma) production and decay, augmented by the calculation of weights incorporating effects due to SM and anomalous tautaugamma couplings. Calculation of these weights is performed in TTGlib library. Powerful reweighting methods and fitting with the help of a Monte Carlo sample are thus possible for experimental measurements of anomalous couplings.

Restrictions:
The high precision of the program may vary depending on the input parameters. See details in Long Write-up. Maximum centre-of-mass energy allowed is 200GeV.

Unusual features:
Main programs and other libraries published independently in Comput. Phys. Commun. must be loaded to run this library. There is no separate distribution of the code prepared for this version of the library. It is stored in its own subdirectory, archived with KORALZ, version 4.04 (Comput. Phys. Commun. 124(2000)233). The demonstration program for the library is also provided there.