Speaker
Description
The creation of a Quark-Gluon Plasma (QGP) during heavy-ion collisions constitute a unique opportunity to study strong interactions under extreme conditions. Therefore, the JETSCAPE collaboration was started with the purpose of developing a multistage framework capable of combining different models at each stage, in order to study the evolution of jets and high-pT probes during heavy-ion collisions. Work is ongoing to upgrade the framework to be able to incorporate small systems such as pA and pp experiments. We present a two-stage approach for these small systems, where a 3D MC-Glauber model is used to describe event-by-event geometric configurations of the colliding system, while the hard scatterings are obtained from PYTHIA and propagated backward in space-time using a new iMATTER module to obtain their initial energies and momenta before the initial-state showers. The initial energies are then subtracted from the incoming colliding nucleons, leaving less energy for the soft-particle production, and leading to a correlation between jets and the multiplicity of small systems.
