TAUOLA for simulation of tau decay and production: perspectives for precision low energy and LHC applications

The status of Monte Carlo system for the simulation of τ-lepton production and decay in high-energy accelerator experiments is reviewed. Since the previous τ-lepton conference in 2008 some practical modifications have been introduced: (i) For the TAUOLA Monte Carlo generator of τ-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. Work on alternative parametrizations of hadronic decays is advanced. (ii) the TAUOLA universal interface based on HepMC (the C++ event record) is now public. A similar interface for PHOTOS is now also public. (iii) Extension of the PHOTOS Monte Carlo for QED bremsstrahlung in decays featuring kernels based on complete first order matrix element are gradually becoming widely available thanks to properties of the new, HepMC based interface. (iv) Systematic tests of the programs with the help of MC-TESTER are now available for FORTRAN and C++ users.The results presented here illustrate the status of the projects performed in collaboration with Nadia Davidson, Piotr Golonka, Gizo Nanava, Tomasz Przedziński, Olga Shekhovtsova, Elżbieta Richter-W̨as, Pablo Roig, Qingjun Xu and others.