Search for supersymmetry in final states with a single lepton, b-quark jets, and missing transverse energy in proton-proton collisions at sqrt(s) = 7 TeV

TL;DR

This paper reports a search for supersymmetry in proton-proton collisions at 7 TeV, focusing on events with a single lepton, b-quark jets, and missing energy, using CMS data from 2011.

Contribution

It introduces a novel analysis targeting light top squarks with specific final states, utilizing data-driven background predictions and interpreting results within supersymmetric models.

Findings

Observed data are consistent with standard model predictions.

No evidence of supersymmetry was found in the analyzed final states.

Constraints are placed on supersymmetric models based on the results.

Abstract

A search motivated by supersymmetric models with light top squarks is presented using proton-proton collision data recorded with the CMS detector at a center-of-mass energy of sqrt(s) = 7 TeV during 2011, corresponding to an integrated luminosity of 4.98 inverse femtobarns. The analysis is based on final states with a single lepton, b-quark jets, and missing transverse energy. Standard model yields are predicted from data using two different approaches. The observed event numbers are found to be compatible with these predictions. Results are interpreted in the context of the constrained minimal supersymmetric standard model and of a simplified model with four top quarks in the final state.