A method for correcting the substructure of multiprong jets using the Lund jet plane

TL;DR

This paper introduces a novel data-driven correction method for the substructure of multiprong jets in high-energy physics, enhancing the accuracy of simulations for complex jet topologies at the LHC.

Contribution

It presents the first robust calibration technique for the substructure of jets with four or more prongs, improving analysis precision in particle physics experiments.

Findings

Improved agreement between data and simulation for substructure observables

Effective correction of radiation patterns in the Lund jet plane

Enables more accurate future measurements and searches for new phenomena

Abstract

Many analyses at the CERN LHC exploit the substructure of jets to identify heavy resonances produced with high momenta that decay into multiple quarks and/or gluons. This paper presents a new technique for correcting the substructure of simulated large-radius jets from multiprong decays. The technique is based on reclustering the jet constituents into several subjets such that each subjet represents a single prong, and separately correcting the radiation pattern in the Lund jet plane of each subjet using a correction derived from data. The data presented here correspond to an integrated luminosity of 138 fb$^{-1}$ collected by the CMS experiment between 2016$-$2018 at a center-of-mass energy of 13 TeV. The correction procedure improves the agreement between data and simulation for several different substructure observables of multiprong jets. This technique establishes, for the first time, a robust calibration for the substructure of jets with four or more prongs, enabling future measurements and searches for new phenomena containing these signatures.