Search for resonant second generation slepton production at the Tevatron

TL;DR

This paper reports a search for resonant second-generation slepton production via R-parity violation at the Tevatron, setting new limits on the coupling parameter and slepton masses based on collected data.

Contribution

It introduces a novel search for resonant smuon and muon-sneutrino production in R-parity violating supersymmetry using Tevatron data, extending previous experimental limits.

Findings

No excess events observed beyond Standard Model predictions.

Established 95% confidence level limits on slepton production cross section and coupling parameter.

Extended constraints on supersymmetric models in the minimal supergravity framework.

Abstract

We present a search for supersymmetry in the R-parity violating resonant production and decay of smuons and muon-sneutrinos in the channels smuon->neutralino_1 muon, smuon->neutralino_2 muon, and muon-sneutrino->chargino muon. We analyzed 0.38 fb^-1 of integrated luminosity collected between April 2002 and August 2004 with the D0 detector at the Fermilab Tevatron Collider. The observed number of events is in agreement with the standard model expectation, and we calculate 95% C.L. limits on the slepton production cross section times branching fraction to gaugino plus muon, as a function of slepton and gaugino masses. In the framework of minimal supergravity, we set limits on the coupling parameter lambda'_211, extending significantly previous results obtained in Run I of the Tevatron and at the CERN LEP collider.