{"language":[{"iso":"eng"}],"date_updated":"2024-03-08T15:58:55Z","title":"Pre-equilibrium photons from the early stages of heavy-ion collisions","publication":"arXiv:2308.09747","abstract":[{"text":"We use QCD kinetic theory to compute photon production in the chemically\r\nequilibrating Quark-Gluon Plasma created in the early stages of high-energy\r\nheavy-ion collisions. We do a detailed comparison of pre-equilibrium photon\r\nrates to the thermal photon production. We show that the photon spectrum\r\nradiated from a hydrodynamic attractor evolution satisfies a simple scaling\r\nform in terms of the specific shear viscosity $\\eta/s$ and entropy density\r\n$dS/d\\zeta \\sim {\\scriptstyle \\left(T\\tau^{1/3}\\right)^{3/2}}_\\infty$. We\r\nconfirm the analytical predictions with numerical kinetic theory simulations.\r\nWe use the extracted scaling function to compute the pre-equilibrium photon\r\ncontribution in $\\sqrt{s_{NN}}=2.76\\,\\text{TeV}$ 0-20\\% PbPb collisions. We\r\ndemonstrate that our matching procedure allows for a smooth switching from\r\npre-equilibrium kinetic to thermal hydrodynamic photon production. Finally, our\r\npublicly available implementation can be straightforwardly added to existing\r\nheavy ion models.","lang":"eng"}],"date_created":"2024-01-04T08:46:29Z","external_id":{"arxiv":["2308.09747"]},"_id":"50171","status":"public","author":[{"full_name":"Oscar Garcia-Montero, Oscar Garcia-Montero","last_name":"Oscar Garcia-Montero","first_name":"Oscar Garcia-Montero"},{"last_name":"Mazeliauskas","full_name":"Mazeliauskas, Aleksas","first_name":"Aleksas"},{"full_name":"Plaschke, Philip","last_name":"Plaschke","first_name":"Philip"},{"full_name":"Schlichting, Sören","last_name":"Schlichting","first_name":"Sören"}],"year":"2023","user_id":"16153","type":"preprint","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"citation":{"mla":"Oscar Garcia-Montero, Oscar Garcia-Montero, et al. “Pre-Equilibrium Photons from the Early Stages of Heavy-Ion Collisions.” <i>ArXiv:2308.09747</i>, 2023.","short":"O.G.-M. Oscar Garcia-Montero, A. Mazeliauskas, P. Plaschke, S. Schlichting, ArXiv:2308.09747 (2023).","chicago":"Oscar Garcia-Montero, Oscar Garcia-Montero, Aleksas Mazeliauskas, Philip Plaschke, and Sören Schlichting. “Pre-Equilibrium Photons from the Early Stages of Heavy-Ion Collisions.” <i>ArXiv:2308.09747</i>, 2023.","bibtex":"@article{Oscar Garcia-Montero_Mazeliauskas_Plaschke_Schlichting_2023, title={Pre-equilibrium photons from the early stages of heavy-ion collisions}, journal={arXiv:2308.09747}, author={Oscar Garcia-Montero, Oscar Garcia-Montero and Mazeliauskas, Aleksas and Plaschke, Philip and Schlichting, Sören}, year={2023} }","ieee":"O. G.-M. Oscar Garcia-Montero, A. Mazeliauskas, P. Plaschke, and S. Schlichting, “Pre-equilibrium photons from the early stages of heavy-ion collisions,” <i>arXiv:2308.09747</i>. 2023.","apa":"Oscar Garcia-Montero, O. G.-M., Mazeliauskas, A., Plaschke, P., &#38; Schlichting, S. (2023). Pre-equilibrium photons from the early stages of heavy-ion collisions. In <i>arXiv:2308.09747</i>.","ama":"Oscar Garcia-Montero OG-M, Mazeliauskas A, Plaschke P, Schlichting S. Pre-equilibrium photons from the early stages of heavy-ion collisions. <i>arXiv:230809747</i>. Published online 2023."}}