Search for supersymmetry in pp collisions at sqrt(s)=7 TeV in events with a single lepton, jets, and missing transverse momentum

TL;DR

This study searches for signs of supersymmetry in proton-proton collisions at 7 TeV, analyzing events with a single high-energy lepton, jets, and missing transverse momentum, but finds results consistent with standard model predictions.

Contribution

First search for supersymmetry in single-lepton events at 7 TeV with CMS, setting new limits on the parameter space of minimal supersymmetric models.

Findings

No excess over standard model backgrounds observed.

Results set new constraints on supersymmetric particle parameters.

Event characteristics match standard model expectations.

Abstract

Results are reported from a search for physics beyond the standard model in proton-proton collisions at a center-of-mass energy of 7 TeV, focusing on the signature with a single, isolated, high-transverse-momentum lepton (electron or muon), energetic jets, and large missing transverse momentum. The data sample comprises an integrated luminosity of 36 inverse picobarns, recorded by the CMS experiment at the LHC. The search is motivated by models of new physics, including supersymmetry. The observed event yields are consistent with standard model backgrounds predicted using control samples obtained from the data. The characteristics of the event sample are consistent with those expected for the production of t t-bar and W +jets events. The results are interpreted in terms of limits on the parameter space for the constrained minimal supersymmetric extension of the standard model.