Search for supersymmetric particles in light gravitino scenarios and sleptons NLSP

TL;DR

This paper reports a comprehensive search for various supersymmetric particles in light gravitino scenarios using data from the DELPHI detector, setting new limits on their masses and model parameters due to no observed evidence.

Contribution

It provides the first combined analysis of multiple supersymmetric particles in light gravitino scenarios with updated mass limits and constraints on supersymmetry breaking scale.

Findings

No evidence for sleptons, neutralinos, or charginos was found.

New lower mass limits for heavy stable charged sleptons were established.

Constraints on the mass of sgoldstinos and the supersymmetry breaking scale were improved.

Abstract

A search for sleptons, neutralinos, charginos, sgoldstinos and heavy stable charged sleptons in the context of scenarios where the lightest supersymmetric particle is the gravitino, is presented. Data collected during 2000 with the DELPHI detector at centre-of-mass energies from 204 to 208 GeV were analysed and combined with all the data collected from 1995 to 1999 at lower energies. No evidence for the production of sleptons, neutralinos and charginos has been found, therefore new limits on the mass of these supersymmetric particles and on the model parameter space are set. The search for heavy stable charged sleptons also updates the stable sleptons mass limit. The absence of evidence for sgoldstino production allows limits to be set on its mass and on the scale of supersymmetry breaking.