Library of anomalous tautaugamma couplings for tau+tau-(etagamma) Monte Carlo programs. T. Paul, J. Swain, Z. Was.

Title of program: TTGlib, version 2.0
Catalogue identifier: ADKZ
Ref. in CPC: 124(2000)243
Distribution format: tar gzip file
Operating system: UNIX, HP-UX 10.2
High speed store required: 1MK words
Number of bits in a word: 32
Number of lines in distributed program, including test data, etc: 215118
Programming language used: Fortran

Nature of physical 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.

Method of solution
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 on the complexity of the problem
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 of the program
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 sub-directory, archived with KORALZ, version 4.04 (Comput. Phys. Commun. 124(2000)233). The demonstration program for the library is also provided there.