2021/04/21 by Mohammad Mahdi Altakach, Altakach, Mohammad Mahdi
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2104.10608
openalex publication_date 2021/04/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss significant improvements to our calculation of electroweak (EW) tt hadroproduction in extensions of the Standard Model (SM) with extra heavy neutral and charged spin-1 resonances using the Recola2 package. We allow for flavour-non-diagonal Z' couplings and take into account non-resonant production in the SM and beyond including the contributions with t-channel W- and W'-bosons. We include next-to-leading order (NLO) QCD corrections and consistently match to parton showers with the POWHEG method fully taking into account the interference effects between SM and new physics amplitudes. We briefly describe the Contour method and give some information about the Rivet repository which catalogues particle-level measurements subsequently used by Contur to set limits on beyond the SM (BSM) theories. We explain how we use our calculation within Contour in order to set limits on models with additional heavy gauge bosons using LHC measurements, and illustrate this with an example using the leptophobic Topcolour (TC) model.