Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations

Abstract

We present a general method that allows one to decay narrow resonances in Les Houches Monte Carlo events in an efficient and accurate way. The procedure preserves both spin correlation and finite width effects to a very good accuracy, and is therefore particularly suited for the decay of resonances in production events generated at next-to-leading-order accuracy. The method is implemented as a generic tool in the MadGraph framework, giving access to a very large set of possible applications. We illustrate the validity of the method and the code by applying it to the case of single top and top quark pair production, and show its capabilities on the case of top quark pair production in association with a Higgs boson.

17 pages, 6 figures, published version

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Next-to-leading-order predictions for t-channel single-top production at hadron colliders
• Scalar and pseudoscalar Higgs production in association with a top-antitop pair
• Heavy-quark mass dependence in global PDF analyses and 3- and 4-flavour parton distributions
• BRIDGE: Branching Ratio Inquiry/Decay Generated Events
• QCD corrections to the hadronic production of a heavy quark pair and a W-boson including decay correlations

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