T-odd correlations from CP violating anomalous top-quark couplings revisited

TL;DR

This paper analyzes CP-violating anomalous top-quark couplings in top-antitop production and decay, providing explicit formulas for triple-product correlations to aid future LHC simulations.

Contribution

It offers explicit analytic expressions for triple-product correlations from anomalous couplings, including all spin correlations, for the first time.

Findings

Explicit formulas for CP-violating observables derived

Inclusion of all spin correlations in the analysis

Framework for numerical simulations at the LHC

Abstract

We revisit the effect of CP violating anomalous top-quark couplings in $t\bar{t}$ production and decay. We consider $t\bar{t}$ production through gluon fusion (and light $q{\bar q}$ annihilation) followed by top-quark decay into $bW$ or $b\ell\nu$. We find explicit analytic expressions for all the triple products generated by the anomalous couplings that fully incorporate all spin correlations. Our results serve as a starting point for numerical simulations for the LHC.