Jet momentum broadening during initial stages in heavy-ion collisions

Abstract

We study the jet quenching parameter $\hat{q}$ in the initial pre-equilibrium stages of heavy-ion collisions using the QCD kinetic theory description of the anisotropic quark-gluon plasma. This allows us to smoothly close the gap in the literature between the early glasma stage of the collision and the onset of hydrodynamics. We find that the pre-hydrodynamic evolution of $\hat{q}$ during the bottom-up kinetic scenario shows little sensitivity to the initial conditions, jet energies and models of the transverse momentum cutoff. We also observe that, similarly to the glasma case, the jet quenching parameter is enhanced along the beam axis as compared to the transverse direction during most of the kinetic evolution.

9 pages, 8 figures; v2: Appendix C and D added including 2 new figures, slightly changed linestyles in various figures, minor changes in introduction and conclusion section. Accepted for publication in PLB. Scripts and values for coefficients a,b can be found in https://doi.org/10.5281/zenodo.10419537 and the code is available in https://doi.org/10.5281/zenodo.10409474

References in corpus (16)

• Calculating the Jet Quenching Parameter from AdS/CFT
• Wilson line correlator in the MV model: relating the glasma to deep inelastic scattering
• Heavy quarks and jets as probes of the QGP
• Momentum Broadening in an Anisotropic Plasma
• Picturing perturbative parton cascades in QCD matter
• High-energy jet quenching in weakly-coupled quark-gluon plasmas
• Jet broadening in unstable non-Abelian plasmas
• QCD Splitting/Joining Functions at Finite Temperature in the Deep LPM Regime
• Simulating jets and heavy quarks in the Glasma using the colored particle-in-cell method
• Jet quenching and broadening: the transport coefficient $\hat{q}$ in an anisotropic plasma
• Jet momentum broadening in the pre-equilibrium Glasma
• Inclusive jet and hadron suppression in a multistage approach
• Jet Broadening in Flowing Matter -- Resummation
• Classical vs quantum corrections to jet broadening in a weakly-coupled Quark-Gluon Plasma
• Exploring jet transport coefficients by elastic scattering in the strongly interacting quark-gluon plasma
• Soft gluon emission from heavy quark scattering in strongly interacting quark-gluon plasma

Cited by in corpus (11)

• Jet quenching parameter in QCD kinetic theory
• Limiting attractors in heavy-ion collisions
• Heavy flavor angular correlations as a direct probe of the glasma
• Minijet quenching in non-equilibrium quark-gluon plasma
• The impact of glasma on heavy flavor azimuthal correlations and spectra
• Giving wake to energy-energy correlators: Hydrodynamic response on the celestial sphere
• Soft-gluon exchange matters: isotropic screening in QCD kinetic theory
• Adiabatic Hydrodynamization and the Emergence of Attractors: a Unified Description of Hydrodynamization in Kinetic Theory
• Bayesian Constraints on Pre-Equilibrium Jet Quenching and Predictions for Oxygen Collisions
• Jet quenching in out-of-equilibrium QCD matter
• Heavy quark diffusion coefficient during hydrodynamization -- non-equilibrium vs. equilibrium