ATLAS Z Excess in Minimal Supersymmetric Standard Model

TL;DR

This paper explores whether the minimal supersymmetric standard model (MSSM) can explain a recent 3 sigma excess observed by ATLAS in events with Z bosons and missing energy, focusing on a specific mass spectrum.

Contribution

It demonstrates that a particular MSSM spectrum with heavier sfermions than gauginos and Higgsinos can account for the ATLAS excess.

Findings

The excess can be explained by a specific MSSM mass spectrum.

The proposed MSSM scenario is consistent with the observed excess.

The model remains plausible despite the current statistical significance.

Abstract

Recently the ATLAS collaboration reported a 3 sigma excess in the search for the events containing a dilepton pair from a Z boson and large missing transverse energy. Although the excess is not sufficiently significant yet, it is quite tempting to explain this excess by a well-motivated model beyond the standard model. In this paper we study a possibility of the minimal supersymmetric standard model (MSSM) for this excess. Especially, we focus on the MSSM spectrum where the sfermions are heavier than the gauginos and Higgsinos. We show that the excess can be explained by the reasonable MSSM mass spectrum.