Search for natural Supersymmetry in events with 1 b-tagged jet using razor variables at 8 TeV

TL;DR

This paper reports a search for natural Supersymmetry with at least one b-tagged jet using razor variables in 8 TeV proton-proton collisions, setting exclusion limits on gluino and LSP masses.

Contribution

It introduces a novel analysis method using razor variables to search for supersymmetry in events with bottom-quark jets at 8 TeV.

Findings

No excess observed over the standard model background.

Gluino masses up to 1375 GeV are excluded for an LSP mass of 100 GeV.

The analysis sets new limits on supersymmetric particle masses.

Abstract

We discuss a search for natural Supersymmetry in events with at least one bottom-quark jet using razor variables in proton-proton collisions at 8 TeV with the CMS detector. The event distribution in the plane defined by the razor variables $R^2$ and $M_R$ is studied, searching for a peaking signal on top of a smoothly falling standard model background. The data are consistent with the expected background, modeled by a template function. The 95% C.L. exclusion limit on the masses of the gluino and lightest supersymmetric particle in a benchmark simplified model is presented. For a lightest supersymmetric particle mass of 100 GeV, the pair production of gluinos in a multi-bottom final state is excluded for gluino masses up to 1375 GeV.