Search for R-parity violating supersymmetry via the LLE couplings lambda_{121}, lambda_{122} or lambda_{133} in ppbar collisions at sqrt(s)=1.96 TeV

TL;DR

This paper reports a search for R-parity violating supersymmetry via specific couplings in proton-antiproton collisions, setting new limits on gaugino masses due to the absence of observed signals.

Contribution

First search for gaugino pair production with trilepton signatures via lambda couplings at the Tevatron, establishing new mass bounds in R-parity violating SUSY models.

Findings

No evidence for supersymmetry was observed.

95% confidence level limits were set on production cross sections.

Lower bounds on neutralino and chargino masses were derived.

Abstract

A search for gaugino pair production with a trilepton signature in the framework of R-parity violating supersymmetry via the couplings lambda_121, lambda_122, or lambda_133 is presented. The data, corresponding to an integrated luminosity of L~360/pb, were collected from April 2002 to August 2004 with the D0 detector at the Fermilab Tevatron Collider, at a center-of-mass energy of sqrt(s)=1.96 TeV. This analysis considers final states with three charged leptons with the flavor combinations eel, mumul, and eetau (l=e or mu). No evidence for supersymmetry is found and limits at the 95% confidence level are set on the gaugino pair production cross section and lower bounds on the masses of the lightest neutralino and chargino are derived in two supersymmetric models.