Speaker
Description
The production of colored particles with large transverse momenta is almost always associated with presence of jets. The processes where three jets emerge in the final state are present in a lot of ATLAS measurements. Proper understanding and modelling of these processes is therefore crucial for today’s high energy physics.
POWHEG generator, as well as other matrix element generators, offer next-to-leading order (NLO) precision for trijet production. However to better understand also regions where final state jets acquire high transverse momenta, the production of pT sliced sample is necessary. Such a production is available in POWHEG generator by setting generation cut on jet pT and eliminating population of low pT regions by introducing so-called Born suppression factor, which serves for suppressing cross section for events based on their jet pT .
In the studies presented, The trijet events generated with Powheg+Pythia8 generator are compared to unfolded ATLAS data generated at √s = 13 𝑇𝑒𝑉 and compared with the already available dijet samples. The RIVET Toolkit (Robust Independent Validation of Experiment and Theory) is aimed for validation of MC samples, it allows to perform quick comparisons between the two models for a wide variety of observables used in many ATLAS analyses. It provides a large (and ever growing) set of experimental analyses useful for MC generator development, validation, and tuning, as well as a convenient infrastructure for adding your own analyses.
