Resonant sneutrino production at Tevatron Run II

TL;DR

This paper investigates the potential to detect resonant sneutrino production at Tevatron Run II through a specific R-parity violating decay channel, enhancing sensitivity to supersymmetric particles and couplings beyond current limits.

Contribution

It presents a detailed analysis of single chargino production via resonant sneutrino decay in a supergravity framework, highlighting improved detection prospects and mass reconstruction methods.

Findings

Extends sensitivity on SUSY particle masses beyond LEP limits.

Probes RPV couplings an order of magnitude below current bounds.

Enables model-independent neutralino mass reconstruction.

Abstract

We consider the single chargino production at Tevatron $p \bar p \to \tilde \nu_i \to \tilde \chi^{\pm}_1 l_i^{\mp}$ as induced by the resonant sneutrino production via a dominant \RPV coupling of type $\l'_{ijk} L_i Q_j D_k^c$. Within a supergravity model, we study the three leptons final state. The comparison with the expected background demonstrate that this signature allows to extend the sensitivity on the \susyq mass spectrum beyond the present LEP limits and to probe the relevant \RPV coupling down to values one order of magnitude smaller than the most stringent low energy indirect bounds. The trilepton signal offers also the opportunity to reconstruct the neutralino mass in a model independent way with good accuracy.