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T: Fachverband Teilchenphysik

T 99: Searches/BSM V

T 99.4: Talk

Friday, March 20, 2026, 09:45–10:00, KH 02.014

New Physics Models in Recola2 — •Luis Miguel Marques Lourenco — JMU, Emil-Hilb-Weg 22, 97074 Würzburg

Our understanding of fundamental interactions depends on our ability to make high precision predictions for observables that can be compared with experimental measurements. After the Higgs discovery, the focus in elementary particle physics has shifted toward precision tests of the Standard Model (SM) and the search for possible extensions motivated by the unresolved shortcomings of the SM. Precise theoretical predictions for BSM scenarios are needed to interpret deviations and identify which model they might indicate.

In recent years, the automation of one-loop QCD and electroweak corrections has substantially improved our ability to produce such predictions across a wide range of models. Recola2 provides automated one-loop matrix elements, including QCD and EW corrections, in the SM as well as for several BSM scenarios. A central ingredient in this progress is the use of flexible universal model formats that can encode not only tree-level interactions but also the counterterm information needed for higher-order calculations. The UFO framework, and its extended version UFO2, provide a practical way to supply such information to modern matrix-element generators. In this talk, I will present a new UFO2 interface for Recola2, which translates the UFO2 files into Recola's Fortran model files. This tool will enable the use of Recola for external models that already include the necessary counterterms, and streamline the path from model building to more precise phenomenological studies, which will be the objective of future work.