Abstract
Multilepton searches for electroweakino and slepton pair production at hadron colliders remain some of the best means to test weak-scale supersymmetry. Searches at the CERN Large Hadron Collider, however, are limited by large diboson and top quark pair backgrounds, despite the application of traditional, central jet vetoes. In this context, we report the impact of introducing dynamic jet vetoes in searches for colorless superpartners. As a representative scenario, we consider the Drell-Yan production of a pair of right-handed smuons decaying into a dimuon system accompanied with missing transverse energy. As an exploratory step, we consider several global and local measures of the leptonic and hadronic activity to construct the veto. In most all cases, we find that employing a dynamic jet veto improves the sensitivity, independently of the integrated luminosity. The inclusion of non-perturbative multiple particle interactions and next-to-leading order jet merging does not alter this picture. Directions for further improvements are discussed.
Highlights
Weak-scale supersymmetry, if realized in nature, presents an attractive solution to several longstanding theoretical and observational shortcomings of the Standard Model of particle physics (SM)
The results are given as a function of the smuon mass, and we indicate the uncertainties stemming from perturbative scale variation and parton distribution function (PDF) fitting
We take into account the Monte Carlo uncertainties for both the signal and the background, and use a flat systematic uncertainty of 20% on the background prediction derived from our FxFx þ multiple particle interactions (MPI) samples
Summary
Weak-scale supersymmetry, if realized in nature, presents an attractive solution to several longstanding theoretical and observational shortcomings of the Standard Model of particle physics (SM). Supersymmetry can protect the Higgs boson mass from large quantum corrections, ensure gauge coupling unification at high scales, and provide a viable weakly interacting dark matter candidate [1,2]. Sub-TeV superpartners of quarks and gluons have largely been excluded by direct searches at the CERN Large Hadron Collider (LHC) [3,4,5,6], the situation is far less conclusive for electroweak (EW) boson and lepton superpartners due to their smaller production cross sections [7,8]. For electroweak boson partners [11,12,13], the case is slightly more interesting due to several small excesses, which reveal a local significance
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