A1 Journal article (refereed)
Evolution of initial stage fluctuations in the glasma (2021)
Guerrero-Rodríguez, P., & Lappi, T. (2021). Evolution of initial stage fluctuations in the glasma. Physical Review D, 104(1), Article 014011. https://doi.org/10.1103/physrevd.104.014011
JYU authors or editors
Publication details
All authors or editors: Guerrero-Rodríguez, Pablo; Lappi, Tuomas
Journal or series: Physical Review D
ISSN: 2470-0010
eISSN: 2470-0029
Publication year: 2021
Publication date: 16/07/2021
Volume: 104
Issue number: 1
Article number: 014011
Publisher: American Physical Society
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1103/physrevd.104.014011
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77191
Web address of parallel published publication (pre-print): https://arxiv.org/abs/2102.09993
Abstract
We perform a calculation of the one- and two-point correlation functions of energy density and axial charge deposited in the glasma in the initial stage of a heavy ion collision at finite proper time. We do this by describing the initial stage of heavy ion collisions in terms of freely evolving classical fields whose dynamics obey the linearized Yang-Mills equations. Our approach allows us to systematically resum the contributions of high momentum modes that would make a power series expansion in proper time divergent. We evaluate the field correlators in the McLerran-Venugopalan model using the glasma graph approximation, but our approach for the time dependence can be applied to a general four-point function of the initial color fields. Our results provide analytical insight into the preequilibrium phase of heavy ion collisions without requiring a numerical solution to the Yang-Mills equations.
Keywords: quark-gluon plasma; nuclear physics
Free keywords: quark-gluon plasma; relativistic heavy-ion collisions; nuclear physics
Contributing organizations
Related projects
- Frontiers of high energy QCD
- Lappi, Tuomas
- Research Council of Finland
- CGCglasmaQGP The nonlinear high energy regime of Quantum Chromodynamics
- Lappi, Tuomas
- European Commission
- The strong interaction at the frontier of knowledge: fundamental research and applications- STRONG -2020
- Lappi, Tuomas
- European Commission
Ministry reporting: Yes
Reporting Year: 2021
JUFO rating: 2