Reducing the top quark mass uncertainty with jet grooming

The measurement of the top quark mass has large systematic uncertainties coming from the Monte Carlo simulations that are used to match theory and experiment. We explore how much that uncertainty can be reduced by using jet grooming procedures. Using the ATLAS A14 tunes of PYTHIA, we estimate the uncertainty from the choice of tuning parameters in what is meant by the Monte Carlo mass to be around 530MeV without any corrections. This uncertainty can be reduced by 60% to 200MeV by calibrating to the W mass and by 70% to 140MeV by additionally applying soft-drop jet grooming (or to 170MeV using trimming). At e(+)e(-) colliders, the associated uncertainty is around 110 MeV, reducing to 50MeV after calibrating to the W mass. By analyzing the tuning parameters, we conclude that the importance of jet grooming after calibrating to the W-mass is to reduce sensitivity to the underlying event.