TauDecay: a library to simulate polarized tau decays via FeynRules and MadGraph5

Dec, 2012
10 pages
Published in:
  • Eur.Phys.J.C 73 (2013) 2489
  • Published: 2013
e-Print:

Citations per year

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Abstract: (Springer)
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.
Note:
  • 10 pages, 12 figures, 3 tables; v2: typo in Eq.(20b) corrected, references added, version accepted by EPJC. 'Note added' also included for the brief TauDecay instruction in MadGraph5_aMC@NLO
  • tau: decay
  • tau: production
  • helicity: amplitude analysis
  • Higgs particle
  • pseudoscalar
  • correlation
  • kinematics
  • Z0
  • tau: polarization