Diagnosing the top-quark angular asymmetry using LHC intrinsic charge asymmetries

Understand

Flavor-violating interactions involving new heavy particles are among proposed explanations for the $t\bar t$ forward-backward asymmetry observed at the Tevatron.

• Many of these models generate a $t\bar t$-plus-jet signal at the LHC.
• In this paper we identify several new charge asymmetric variables in $t\bar tj$ events that can contribute to the discovery of such models at the LHC.
• We propose a data-driven method for the background, largely eliminating the need for a Monte Carlo prediction of $t\bar t$-plus-jets, and thus reducing systematic errors.