Down Type Isosinglet Quarks in ATLAS

TL;DR

This paper assesses the ATLAS experiment's ability to discover down type isosinglet quarks through various decay channels, estimating the required luminosity for different quark masses between 600 and 1000 GeV.

Contribution

It provides a comprehensive analysis of the discovery potential for down type isosinglet quarks at ATLAS across multiple decay modes.

Findings

Discovery reach estimated for quark masses 600-1000 GeV.

Integrated luminosity requirements vary with quark mass and decay channel.

Combines multiple search channels for improved sensitivity.

Abstract

We evaluate the discovery reach of the ATLAS experiment for down type isosinglet quarks, $D$, using both their neutral and charged decay channels, namely the process $pp\to D\bar{D}+X$ with subsequent decays resulting in $2\ell+2j+E^{miss}_{T}$, $3\ell+2j+E^{miss}_{T}$ and $2\ell+4j$ final states. The integrated luminosity required for observation of a heavy quark is estimated for a mass range between 600 and 1000 GeV using the combination of results from different search channels.