Chargino reconstruction in supersymmetry with long-lived staus

TL;DR

This paper proposes a method to reconstruct charginos in supersymmetric models with long-lived staus at colliders, focusing on transverse mass distributions and neutrino momentum isolation.

Contribution

It introduces a novel approach to reconstruct charginos in SUSY scenarios with long-lived staus, extending previous neutralino reconstruction methods.

Findings

Reconstruction method effective in specific parameter regions

Identification of transverse mass distribution features

Procedure for isolating neutrino transverse momenta

Abstract

We consider a supersymmetric (SUSY) scenario including right-handed neutrinos, one of whose scalar superpartners is the lightest SUSY particle (LSP). The distinguishing feature in the collider signal of SUSY in such a case is not missing energy but a pair of charged tracks corresponding to the next-to- lightest SUSY particle, when it is, as in the case considered, a stau. Following up on our recent work on neutralino reconstruction in such cases, we explore the possibility of reconstructing charginos, too, through a study of transverse mass distributions in specified final states. The various steps of isolating the transverse momenta of neutrinos relevant for this are outlined, and regions of the parameter space where our procedure works are identified.