Probing the multi-scale dynamical interaction between heavy quarks and the QGP using JETSCAPE

Abstract

The dynamics of shower development for a jet traveling through the QGP involves a variety of scales, one of them being the heavy quark mass. Even though the mass of the heavy quarks plays a subdominant role during the high virtuality portion of the jet evolution, it does affect longitudinal drag and diffusion, stimulating additional radiation from heavy quarks. These emissions partially compensate the reduction in radiation from the dead cone effect. In the lower virtuality part of the shower, when the mass is comparable to the transverse momenta of the partons, scattering and radiation processes off heavy quarks differ from those off light quarks. All these factors result in a different nuclear modification factor for heavy versus light flavors and thus for heavy-flavor tagged jets. In this study, the heavy quark shower evolution and the fluid dynamical medium are modeled on an event by event basis using the JETSCAPE Framework. We present a multi-stage calculation that explores the differences between various heavy quark energy-loss mechanisms within a realistically expanding quark-gluon plasma (QGP). Inside the QGP, the highly virtual and energetic portion of the shower is modeled using the MATTER generator, while the LBT generator models the showers induced by energetic and close-to-on-shell heavy quarks. Energy-momentum exchange with the medium, essential for the study of jet modification, proceeds using a weak coupling recoil approach. The JETSCAPE framework allows for transitions, on the level of individual partons, from one energy-loss prescription to the other depending on the parton's energy and virtuality and the local density. This allows us to explore the effect and interplay between the different regimes of energy loss on the propagation and radiation from hard heavy quarks in a dense medium.

arXiv admin note: substantial text overlap with arXiv:2002.06643

References in corpus (7)

• Multiple Parton Scattering in Nuclei: Parton Energy Loss
• Hard collinear gluon radiation and multiple scattering in a medium
• Energy loss, hadronization and hadronic interactions of heavy flavors in relativistic heavy-ion collisions
• Incorporating Space-Time Within Medium-Modified Jet Event Generators
• Multiple jets and $\gamma$-jet correlation in high-energy heavy-ion collisions
• Drag induced radiative loss from semi-hard heavy quarks
• The JETSCAPE framework