Multi-scale evolution of charmed particles in a nuclear medium

TL;DR

This paper models charm quark interactions with quark-gluon plasma across multiple scales using combined formalisms, successfully describing D-meson and charged hadron suppression in heavy-ion collisions.

Contribution

It introduces a multi-scale approach combining higher twist and Boltzmann transport formalisms within the JETSCAPE framework for charm quark energy loss in QGP.

Findings

Accurately describes D-meson RAA across centralities

Incorporates coherence effects reducing emission rates

Demonstrates the interplay of different energy scales in QGP interactions

Abstract

Parton energy-momentum exchange with the quark gluon plasma (QGP) is a multi-scale problem. In this work, we calculate the interaction of charm quarks with the QGP within the higher twist formalism at high virtuality and high energy using the MATTER model, while the low virtuality and high energy portion is treated via a (linearized) Boltzmann Transport (LBT) formalism. Coherence effect that reduces the medium-induced emission rate in the MATTER model is also taken into account. The interplay between these two formalisms is studied in detail and used to produce a good description of the D-meson and charged hadron nuclear modification factor RAA across multiple centralities. All calculations were carried out utilizing the JETSCAPE framework.