Precision calculations for groomed event shapes at HERA

TL;DR

This paper presents advanced QCD predictions for groomed event shapes in deep-inelastic scattering at HERA, incorporating resummation, matching, and non-perturbative corrections to improve theoretical understanding.

Contribution

It introduces resummed and matched calculations for groomed invariant-mass event shapes in DIS, including soft-drop grooming effects and non-perturbative corrections from Monte Carlo simulations.

Findings

Resummed predictions match experimental data well.

Inclusion of grooming improves theoretical precision.

Non-perturbative corrections are effectively modeled.

Abstract

The possibility to reanalyse data taken by the HERA experiments offers the chance to study modern QCD jet and event-shape observables in deep-inelastic scattering production. In this contribution we present resummed and matched predictions for the groomed invariant-mass event shape in neutral-current DIS including the effect of grooming the hadronic final state using the soft-drop technique. Non-perturbative corrections from hadronisation are taken into account through parton-to-hadron level transfer matrices extracted from dedicated Monte Carlo simulations with SHERPA, including uncertainties extracted from replica tunes to data from the HERA experiments.