Year: 2024
Type: article
Abstract: The discovery of the stop - the Supersymmetric partner of the top quark - is a key goal of the physics program enabled by the Large Hadron Collider. Although much of the accessible parameter space has already been probed, all current searches assume the top mass is known. This is relevant for the "stealth stop" regime, which is characterized by decay kinematics that force the final state top quark off its mass shell; such decays would contaminate the top mass measurements. We investigate the resulting bias imparted to the template method based ATLAS approach. A careful recasting of these results shows that effect can be as large as 2.0 GeV, comparable to the current quoted uncertainty on the top mass. Thus, a robust exploration of the stealth stop splinter requires the simultaneous consideration of the impact on the top mass. Additionally, we explore the robustness of the template technique, and point out a simple strategy for improving the methodology implemented for the semi-leptonic channel.
Institution: University of Oregon
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: THEORETICAL INVESTIGATIONS IN PARTICLE PHYSICS, EXPERIMENTAL HIGH ENERGY PHYSICS, LEAVING NO STONE UNTURNED IN THE PURSUIT OF NEW PHYSICS, JET PHYSICS AND QUANTUM FIELD THEORY FOR THE LARGE HADRON COLLIDER, SEARCH FOR NEW PHYSICS WITH TOP QUARKS AND UPGRADE TO THE ATLAS LIQUID ARGON CALORIMETER
OpenAlex ID: W3100646191