Latest constraint on non-standard top-gluon couplings at hadron colliders and its future prospect

TL;DR

This paper updates constraints on non-standard top-gluon couplings using recent collider data, showing improved limits and discussing future prospects with higher-energy LHC results.

Contribution

It provides the latest combined constraints on top-gluon couplings from multiple collider datasets and explores potential improvements with future 14-TeV LHC data.

Findings

8-TeV data strengthens the chromoelectric-dipole moment constraint

Combined data yields tighter bounds than previous analyses

Future 14-TeV results could further improve these constraints

Abstract

Constraints on the non-standard top-gluon couplings composed of the chromomagnetic- and chromoelectric-dipole moments of the top quark are updated by combining the latest data of top-pair productions from the Tevatron, 7-TeV LHC, and 8-TeV LHC. We find that adding the recent 8-TeV data to the analysis is effective to get a stronger constraint on the chromoelectric-dipole moment than the one from the Tevatron and 7-TeV LHC alone. We also discuss how those constraints on the non-standard couplings could be further improved when 14-TeV LHC results become available in the near future.