Evolution of initial stage fluctuations in the glasma
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
Published inPhysical Review D
© Authors, 2021
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.
PublisherAmerican Physical Society
Publication in research information system
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Related funder(s)European Commission; Academy of Finland
Funding program(s)Academy Project, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingThis work was supported by the Academy of Finland, Project No. 321840 and under the European Union’s Horizon 2020 research and innovation programme by the European Research Council (ERC, Grant No. ERC-2015-CoG-681707) and by the H2020 Research InfrastructuresSTRONG-2020 project (Grant No. 824093). The content of this paper does not reflect the official opinion of the European Union and responsibility for the information and views expressed therein lies entirely with the authors. ...
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