Field-Theoretic Analysis of Hadronization Using Soft Drop Jet Mass

TL;DR

This paper combines field theory insights and high-precision calculations to analyze hadronization effects in soft drop jet mass, providing a model-independent framework for improving jet substructure modeling in collider physics.

Contribution

It introduces a systematic, model-independent approach to study hadronization power corrections in soft drop jet mass using NNLL calculations and universality predictions.

Findings

Hadronization models perform better for quark jets than gluon jets.

The framework constrains hadronization modeling and improves event generator accuracy.

Provides tools for precision collider data analysis with jet substructure.

Abstract

One of the greatest challenges in quantum chromodynamics is understanding the hadronization mechanism, which is also crucial for carrying out precision physics with jet substructure. In this Letter, we combine recent advancements in our understanding of the field theory-based nonperturbative structure of the soft drop jet mass with precise perturbative calculations of its multi-differential variants at next-to-next-to-leading logarithmic (NNLL) accuracy. This enables a systematic study of its hadronization power corrections in a completely model-independent way. We calibrate and test hadronization models and their interplay with parton showers by comparing our universality predictions with various event generators for quark and gluon initiated jets in both lepton-lepton and hadron-hadron collisions. We find that hadronization models perform better for quark jets relative to gluon jets. Our results provide the necessary toolkit for precision studies with the soft drop jet mass motivating future analyses using real world collider data. The nontrivial constraints derived in our framework are useful for improving the modeling of hadronization and its interface with parton showers in next generation event generators.