Studies of Dark Showers for Present and Future Colliders

Abstract: In this work we explore a strongly-interacting dark sector with a Z’ portal to the Standard Model. We focus on the dark shower phenomenology and their semi-visible jet signatures with a strong emphasis on first principles of the theory. We use Pythia and Delphes for event generations and detector simulations, and consider both pp and e+e− collision events at 13 TeV. The kinematic studies are based on jet objects with radius R = 0.4 or R = 0.8. This work highlights important model parameters and studies correlations between several of these parameters and the kinematics of dark shower models. Additionally, we take a closer look at the r_inv parameter that is commonly used in semi-visible jet studies and propose a new variable, r_rec, based on event energy. This new variable is realistically observable and shows a strong correlation to r_inv in e+e− collision events.