The angular structure of jet quenching within a hybrid strong/weak coupling model

TL;DR

This paper enhances a hybrid jet quenching model by studying transverse momentum broadening and medium response effects, proposing new observables for better constraints, and comparing results with experimental data.

Contribution

It introduces new observables based on jet shape ratios to better probe in-medium broadening effects within a hybrid model.

Findings

Inclusive jet observables show little sensitivity to broadening strength.

Proposed jet shape ratios are sensitive to in-medium broadening parameters.

Model results qualitatively agree with experimental 'missing-pt' data.

Abstract

Building upon the hybrid strong/weak coupling model for jet quenching, we incorporate and study the effects of transverse momentum broadening and medium response of the plasma to jets on a variety of observables. For inclusive jet observables, we find little sensitivity to the strength of broadening. To constrain those dynamics, we propose new observables constructed from ratios of differential jet shapes, in which particles are binned in momentum, which are sensitive to the in-medium broadening parameter. We also investigate the effect of the back-reaction of the medium on the angular structure of jets as reconstructed with different cone radii R. Finally we provide results for the so called "missing-pt", finding a qualitative agreement between our model calculations and data in many respects, although a quantitative agreement is beyond our simplified treatment of the hadrons originating from the hydrodynamic wake.