LHC Dijet Signals in New Physics Models for Top Forward-Backward Asymmetry

TL;DR

This paper investigates how new physics models explaining the top forward-backward asymmetry affect dijet signals at the LHC, showing current constraints and future sensitivity improvements with more data.

Contribution

It analyzes the impact of flavor-changing interactions in t-mediator models on dijet production and constrains Z' couplings using early LHC data.

Findings

LHC dijet measurements constrain Z' couplings to be less than 2.5-3.

Sensitivity to new physics will improve with increased LHC luminosity.

Current data already restricts certain flavor-changing interaction strengths.

Abstract

The dijet signature at the LHC is studied in new physics models for the top forward-backward asymmetry at the Tevatron. In the t-mediator models, flavor-changing interactions contribute to the dijet production cross section as well as the asymmetry at least at the one-loop level. It is found that the LHC dijet measurements at 36pb^(-1) have constrained the Z' coupling larger than 2.5-3. The sensitivity is expected to be improved significantly as the integrated luminosity increases in the LHC.