On heavy-flavour jets with Soft Drop

TL;DR

This paper analyzes heavy-flavour jets groomed with Soft Drop, using resummed perturbation theory and Monte Carlo simulations to understand their properties and correlations with fragmentation functions.

Contribution

It provides the first analytic calculations for Soft Drop variables in heavy-flavour jets initiated by massive quarks, enhancing theoretical understanding.

Findings

Analytic results for the opening angle and momentum fraction in Soft Drop heavy-flavour jets.

Comparison showing good agreement between resummed theory and Monte Carlo simulations.

Insights into correlations between Soft Drop energy fraction and heavy-quark fragmentation observables.

Abstract

We study hadronic jets that are tagged as heavy-flavoured, i.e. they contain either beauty or charm. In particular, we consider heavy-flavour jets that have been groomed with the Soft Drop algorithm. In order to achieve a deeper understanding of these objects, we apply resummed perturbation theory to jets initiated by a massive quark and we perform analytic calculations for two variables that characterise Soft Drop jets, namely the opening angle and the momentum fraction of the splitting that passes Soft Drop. We compare our findings to Monte Carlo simulations. Furthermore, we investigate the correlation between the Soft Drop energy fraction and alternative observables that aim to probe heavy-quark fragmentation functions.