Probing Minimal Flavor Violation with Long-Lived Stops and Light Gravitinos at Hadron Colliders

TL;DR

This paper investigates how long-lived stops and light gravitinos in minimal flavor violation models can be detected at hadron colliders, analyzing decay properties and collider search bounds to test the model's validity.

Contribution

It explores the decay behavior of long-lived stops with light gravitinos within MFV, providing collider search bounds and projections to test the model.

Findings

Long-lived stops can be consistent with MFV under certain mass conditions.

Collider searches place bounds on stop and gravitino masses.

Projected sensitivities could further constrain the model.

Abstract

In the framework of minimal flavor violation (MFV), we discuss the decay properties of a supersymmetric scalar top (stop) in the presence of a light gravitino. Given a small mass difference between the lighter stop and lightest neutralino and an otherwise sufficiently decoupled spectrum, the stop may be long-lived and thus can provide support to MFV at hadron colliders. For a bino-like lightest neutralino, we apply bounds from searches in the gamma gamma plus missing transverse energy channel (ATLAS with 1 fb^-1 and D0 with 6.3 fb^-1) and give a 5 fb^-1 projection for the ATLAS search.