Search for High-Mass Resonances Decaying to e-mu in ppbar Collisions at sqrt(s)=1.96 TeV

TL;DR

This study searches for high-mass resonances decaying to e-mu in proton-antiproton collisions at 1.96 TeV, finding no significant excess and setting limits on certain particle masses.

Contribution

It presents a general search for e-mu resonances in ppbar collisions at Tevatron energies, providing new limits on sneutrino and Z' masses based on observed data.

Findings

No significant excess of e-mu events observed.

Limits set on sneutrino and Z' masses.

Data consistent with Standard Model predictions.

Abstract

We describe a general search for resonances decaying to a neutral e-mu final state in ppbar collisions at a center-of-mass energy of 1.96 TeV. Using a data sample representing 344 pb^-1 of integrated luminosity recorded by the CDF-II experiment, we compare Standard Model predictions with the number of observed events for invariant masses between 50 and 800 GeV/c^2. Finding no significant excess (5 events observed vs. 7.7 +/- 0.8 expected for e-mu invariant masses > 100 GeV/c^2), we set limits on sneutrino and Z' masses as functions of lepton family number violating couplings.