Leptonic top-quark asymmetry predictions at LHCb

TL;DR

This paper explores the potential for LHCb to measure top-quark pair asymmetry in a unique kinematic region, providing predictions and analysis strategies for future data to detect non-zero asymmetry.

Contribution

It introduces new analysis strategies and fixed-order predictions for leptonic asymmetry variables at LHCb, focusing on a less symmetric production channel.

Findings

Non-zero asymmetry could be observed beyond 5σ with full LHCb 14 TeV data.

Analysis strategies are proposed for two leptonic final states.

Predictions indicate measurable asymmetry in the specified kinematic region.

Abstract

The forward LHCb acceptance offers the possibility of measuring the top-quark pair asymmetry in a kinematic region that does not receive overwhelming dilution from the symmetric gluon-fusion channel. To investigate this possibility, two leptonic final states are identified, and analysis strategies are proposed for each channel with 14~TeV data. Leading fixed-order predictions are then provided for the relevant leptonic asymmetry variables in each channel. If backgrounds can be experimentally constrained, statistically, a non-zero asymmetry is estimated to be observable beyond 5$\sigma$ confidence level with the full LHCb 14~TeV data.