Search for supersymmetry in events with a Z boson, jets and missing energy

TL;DR

This paper searches for signs of supersymmetry in events with a Z boson, jets, and missing energy using CMS data, employing a novel analysis method to set limits on supersymmetric models.

Contribution

Introduces the Jet-Z Balance method for analyzing events and provides a precise background estimation in a search for supersymmetry at the LHC.

Findings

No significant excess beyond the Standard Model observed.

Upper limits set on simple supersymmetry models.

Method enhances background estimation accuracy.

Abstract

We present a search for Physics beyond the Standard Model (SM) in final states with a Z boson, jets and missing transverse energy, using a data sample collected in 2011 by the CMS detector at the Large Hadron Collider corresponding to an integrated luminosity of 2.1 /fb. This final state is predicted in several models of Physics beyond the SM, including supersymmetry. A novel analysis method is exploited, the Jet-Z Balance method, and a precise determination of the total SM background is obtained using a control sample from data. In the absence of any significant excess beyond the SM background, upper limits are set on simple models of supersymmetry, and further information is provided to allow confrontation of other models to these results.