Comparing energy loss phenomenology
M. van Leeuwen
TL;DR
This paper compares two theoretical models of parton energy loss in dense QCD matter to better interpret high-pT hadron suppression observed in heavy ion collisions.
Contribution
It systematically analyzes the opacity expansion and multiple-soft scattering approximation within the TECHQM 'brick problem' framework.
Findings
Both models are evaluated for their applicability to RHIC data.
The parameter ranges where each approximation is valid are identified.
Insights into the interpretation of high-pT suppression measurements are provided.
Abstract
High-pT particle production is suppressed in heavy ion collisions due to parton energy loss in dense QCD matter. Here we present a systematic comparison of two different theoretical approximations to parton energy loss calculations: the opacity expansion and the multiple-soft scattering approximation for the simple case of a quark traversing a homogeneous piece of matter with fixed length (the TECHQM 'brick problem'), with focus on the range of parameters that is relevant for interpreting RHIC measurements of high-pT hadron suppression.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Particle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions