Understanding mass hierarchy in collisional energy loss through heavy flavor data

Abstract

While experimental observations, such as the mass hierarchy effect, are attributed and analyzed within radiative models, their interpretation crucially depends on collisional energy loss contribution, which is often neglected in such analyses. To our knowledge, neither a (direct) simple relation between collisional energy loss and heavy quark mass is established, nor an observable that quantifies this effect. On the other hand, the upcoming high-luminosity measurements at RHIC and LHC will generate heavy flavor data with unprecedented precision, providing an opportunity to utilize high-pT heavy flavor data to analyze the interaction mechanisms in the quark-gluon plasma. To this end, we employ a recently developed DREENA framework based on our dynamical energy loss formalism to study the mass hierarchy in heavy flavor suppression. We present i) Analytical derivation of a direct relation between collisional suppression/energy loss and heavy quark mass. ii) A novel observable sensitive only to the collisional energy loss mechanism to be tested by future high-precision experiments. iii) Analytical and numerical extraction of the mass hierarchy in collisional energy losses through this observable.

15 pages, 4 figures

References in corpus (12)

• Radiative and Collisional Jet Energy Loss in the Quark-Gluon Plasma at RHIC
• A light-cone wavefunction approach to open heavy flavor dynamics in QCD matter
• Collisional Energy Loss in a Finite Size QCD Matter
• Radiative energy loss in a finite dynamical QCD medium
• Heavy Quark Diffusion with Relativistic Langevin Dynamics in the Quark-Gluon Fluid
• Nuclear modification of high transverse momentum particle production in p+A collisions at RHIC and LHC
• RHIC and LHC jet suppression in non-central collisions
• Electric and Magnetic Screening Masses at Finite Temperature from Generalized Polyakov-Line Correlations in Two-flavor Lattice QCD
• Radiative heavy quark energy loss in a dynamical QCD medium
• Heavy flavor puzzle at RHIC: analysis of the underlying effects
• Gluon radiation by heavy quarks at intermediate energies and consequences for the mass hierarchy of energy loss
• Collisional parton energy loss in a finite size QCD medium revisited: Off mass-shell effects