Studying the 3+1D structure of the Glasma using the weak field approximation

¹ Institute for Theoretical Physics, TU Wien, A-1040 Vienna, Austria
² Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany
³ Department of Physics, University of Jyväskylä, FI-40014 Jyväskylä, Finland
⁴ Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland

^* e-mail: ipp@hep.itp.tuwien.ac.at
^** e-mail: markus.leuthner@tuwien.ac.at
^*** Presenter and corresponding author, e-mail: dmueller@hep.itp.tuwien.ac.at
^**** e-mail: sschlichting@physik.uni-bielefeld.de
^† e-mail: prasingh@jyu.fi

Published online: 22 December 2022

Abstract

We extend the weak field approximation for the Glasma beyond the boost-invariant approximation, which allows us to compute rapidity-dependent observables in the early stages of heavy-ion collisions. We show that in the limit of small fields, the weak field approximation agrees quantitatively with non-perturbative lattice simulations. Furthermore, we demonstrate that the rapidity profile of the transverse pressure is determined by longitudinal color correlations within the colliding nuclei.