1201.6608 (Z. Was)

New hadronic currents in TAUOLA: for confrontation with the experimental
data    [PDF]

Z. Was

The status of implementation of new hadronic currents into the Monte Carlo
system for simulation of tau-lepton production and decay in high-energy
accelerator experiments is reviewed. Since the tau-lepton conference in 2010
substantial progress was achieved: (i) For the TAUOLA Monte Carlo generator of
tau-lepton decays, automated and simultaneous use of many versions of form
factors for the calculation of optional weights for fits was developed and
checked to work in the Belle and BaBar software environment. Alternative
parameterizations of hadronic currents based on the Resonance Chiral approach
are available now. This was achieved for more than 88% of the total tau
hadronic width. (ii) the TAUOLA universal interface based on HepMC (the C++
event record) is available. This is the case for C++ users of PHOTOS Monte
Carlo for radiative corrections in decays, as well. An algorithm for weighted
events to explore spin effects in analysis of hard processes was prepared.
(iii) Kernels featuring a complete first-order matrix element are available now
for PHOTOS users interested in decays of Z and W bosons. New tests with
different options of matrix elements for those and for Kl3 decays are available
as well. Presented results illustrate the status of the projects performed in
collaboration with Zofia Czyczula, Nadia Davidson, Tomasz Przedzinski, Olga
Shekhovtsova, Elzbieta Richter-Was, Pablo Roig, Qingjun Xu and others.

View original: http://arxiv.org/abs/1201.6608