Medium response from mini-jets and in-medium hadronization in relativistic heavy ion collisions
S. Ryu*, S. McDonald, C. Shen, S. Jeon and C. Gale
Published on:
September 01, 2021
Abstract
In ultra-relativistic heavy-ion collisions, partons with intermediate energy (5-10) GeV excite ripples as they travel through the Quark-Gluon Plasma (QGP). These ripples' effect on particle production phenomenology is not very well studied. In this work, we extend our previous work and present study using a state-of-the-art hybrid framework that consists of the IP-Glasma pre-thermalization dynamics, viscous hydrodynamics (MUSIC), jet energy loss (MARTINI), and hadronic re-scatterings (UrQMD). This framework consistently handles both soft and hard physics involved in relativistic heavy ion collisions. The energy loss of mini-jets, whose energy is between 5 to 10 GeV, and their induced medium excitation are considered. The energy and momentum lost from the mini-jets are treated as either free-streaming wave-packets or causal diffusive perturbations of the hydrodynamic flow. They alter the energy-stress tensor evaluated on the particlization hypersurface during the hadronization as jet induced medium response. In addition, this approach uses a novel in-medium fragmentation, where the color neutrality of a string is enforced locally. We quantify the importance of the medium response from mini-jets propagation and their in-medium hadronization on identified particle $p_T$-spectra and their flow anisotropic coefficients.
DOI: https://doi.org/10.22323/1.387.0160
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