Search for techniparticles in e +jets events at D0

TL;DR

This paper searches for technicolor particles in electron plus jets events at the D0 experiment, setting exclusion limits on techniparticle masses due to no observed excess over standard model predictions.

Contribution

It introduces two analysis methods based on topological variables to search for techniparticles in electron plus jets events at the Tevatron.

Findings

No excess observed above standard model predictions.

Exclusion limits set on pi_T and rho_T mass plane.

Analysis methods effectively identify b and c quark jets.

Abstract

We search for the technicolor process ppbar -> rho_T/omega_T ->W+pi_T in events containing one electron and two jets, in data corresponding to an integrated luminosity of 390 pb-1, recorded by the D0 experiment at the Fermilab Tevatron. Technicolor predicts that technipions, pi_T, decay dominantly into b-bbar, b-cbar, or bbar-c, depending on their charge. In these events b and c quarks are identified by their secondary decay vertices within jets. Two analysis methods based on topological variables are presented. Since no excess above the standard model prediction was found, the result is presented as an exclusion in the pi_T vs. rho_T mass plane for a given set of model parameters.