https://doi.org/10.1140/epjc/s10052-013-2489-4
Special Article - Tools for Experiment and Theory
TauDecay: a library to simulate polarized tau decays via FeynRules and MadGraph5
1
KEK Theory Center, and Sokendai, Tsukuba, 305-0801, Japan
2
ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, Monash University, Melbourne, Victoria, 3800, Australia
3
Theoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, and International Solvay Institutes, Pleinlaan 2, 1050, Brussels, Belgium
* e-mail: tong.li@monash.edu
Received:
21
January
2013
Revised:
26
May
2013
Published online:
12
July
2013
TauDecay is a library of helicity amplitudes to simulate polarized tau decays, constructed in the FeynRules and MadGraph5 framework. Together with the leptonic mode, the decay library includes the main hadronic modes, τ→ν τ +π, 2π, and 3π, which are introduced as effective vertices by using FeynRules. The model file allows us to simulate tau decays when the on-shell tau production is kinematically forbidden. We also demonstrate that all possible correlations among the decay products of pair-produced taus through a Z boson and a scalar/pseudoscalar Higgs boson are produced automatically. The program has been tested carefully by making use of the standard tau decay library Tauola.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013