Precise predictions for electroweakino-pair production in association with a jet at the LHC

TL;DR

This paper provides precise NLO SUSY-QCD predictions for electroweakino pair production with a jet at the LHC, including matching to parton showers, crucial for accurate jet distribution modeling.

Contribution

The authors developed a full NLO SUSY-QCD calculation with parton-shower matching for electroweakino pair production, implemented in the POWHEG-BOX, and demonstrated its phenomenological relevance.

Findings

NLO-QCD corrections significantly affect jet distributions.

Parton-shower effects are crucial for accurate modeling.

The code is compatible with current experimental limits.

Abstract

We present the full NLO SUSY-QCD corrections to the pair production of neutralinos and charginos at the LHC in association with a jet and their matching to parton-shower programs in the framework of the POWHEG-BOX package. The code we have developed provides a SUSY Les Houches Accord interface for setting electroweak and supersymmetric input parameters. Decays of the neutralinos and charginos and parton-shower effects can be simulated with multi-purpose programs such as PYTHIA. The capabilities of the code are illustrated by phenomenological results for a parameter point in the framework of pMSSM10, compatible with present experimental limits on supersymmetry. We find that NLO-QCD corrections as well as parton-shower effects are of primary importance for the appropriate description of jet distributions.