Monte Carlo Simulation of Hard Radiation in Decays in Beyond the Standard Model Physics in Herwig++

Understand

We use the POWHEG formalism in the Herwig++ event generator to match QCD real-emission matrix elements with the parton shower for a range of decays relevant to Beyond the Standard Model physics searches.

• Applying this correction affects the shapes of experimental observables and so changes the number of events passing selection criteria.
• To validate this approach, we study the impact of the correction on Standard Model top quark decays.
• We then illustrate the effect of the correction on Beyond the Standard Model scenarios by considering the invariant-mass distribution of dijets produced in the decay of the lightest Randall-Sundrum graviton and transverse momentum distributions for decays in Supersymmetry.