# Uncover Compressed Supersymmetry via Boosted Bosons from the Heavier Stop/Sbottom

## TL;DR

This paper proposes a new search strategy using boosted bosons from heavier stop and sbottom decays to detect compressed supersymmetry spectra at the LHC, offering improved sensitivity over traditional methods.

## Contribution

It introduces a novel approach focusing on boosted bosons from heavier SUSY partners to probe compressed spectra, enhancing detection prospects for natural SUSY.

## Key findings

- Boosted boson signatures improve search sensitivity.
- The method outperforms multi-lepton strategies.
- Effective for quasi-natural SUSY with heavier colored partners.

## Abstract

A light stop around the weak scale is a hopeful messenger of natural supersymmetry (SUSY), but it has not shown up at the current stage of LHC. Such a situation raises the question of the fate of natural SUSY. Actually, a relatively light stop can easily be hidden in a compressed spectra such as mild mass degeneracy between stop and neutralino plus top quark. Searching for such a stop at the LHC is a challenge. On the other hand, in terms of the argument of natural SUSY, other members in the stop sector, including a heavier stop $\tilde{t}_2$ and lighter sbottom $\tilde{b}_1$ (both assumed to be left-handed-like), are also supposed to be relatively light and therefore searching for them would provide an alternative method to probe natural SUSY with a compressed spectrum. In this paper we consider quasi-natural SUSY which tolerates relatively heavy colored partners near the TeV scale, with a moderately large mass gap between the heavier members and the lightest stop. Then $W/Z/h$ as companions of $\tilde{t}_2$ and $\tilde{b}_1$ decaying into $\tilde{t}_1$ generically are well boosted, and they, along with other visible particles from $\tilde{t}_1$ decay, are a good probe to study compressed SUSY. We find that the resulting search strategy with boosted bosons can have better sensitivity than those utilizing multi-leptons.