Towards Precision SM Effective Field Theory: NLO and Automation

por Dr. Cen Zhang (Brookhaven National Laboratory)

martes 13 sept. 2016 11:00 → 12:00 Europe/Madrid

1001-Primera-135 - Nave Exp. Sala de Audiovisuales (Universe)

The standard model (SM) effective field theory (EFT) is a powerful approach to SM deviations, where predictions can be systematically improved in precision. I will discuss some recent progresses and ongoing efforts in developing the SM EFT to next-to-leading order (NLO) accuracy, in particular in the top-quark sector. Based on the MadGraph5_aMC@NLO framework, one can start from an EFT with top-quark operators, and make NLO predictions for various processes, for cross sections as well as distributions, in a fully automatic way. Furthermore, NLO results matched to the parton shower simulation are available, allowing for event generation to be directly employed in an experimental analyses. These works provide a solid basis for the interpretation of current and future measurements in the EFT framework, with improved accuracy and precision. I will also show an example, where the EFT is used in a top-down way to improve the prediction of a concrete model.