Martínez, MauricioSievert, Matthew D.Wertepny, Douglas E.2020-05-042020-05-042018Martinez, M., Sievert, M.D. & Wertepny, D.E. Toward initial conditions of conserved charges. Part I. Spatial correlations of quarks and antiquarks. J. High Energ. Phys. 2018, 3 (2018)1029-8479http://hdl.handle.net/10347/21991In this paper, we study the spatial correlations among quarks and antiquarks produced at mid-rapidity by gluon pair production in the color glass condensate framework. This paper is the first part of a series in which we calculate a complete set of quark/quark, quark/antiquark, and antiquark/antiquark spatial correlation functions in heavy-light ion collisions, with the goal of incorporating their conserved charges into the initial conditions of hydrodynamics. The physical mechanisms captured in this calculation include geometric, entanglement, and interaction-mediated correlations. In this first paper, we construct the building blocks for the correlations arising from single- and double-pair production, studying in detail the single-pair case and the general features of the double-pair case. We find a rich correlation structure in transverse coordinate space, with different mechanisms dominating over different length scales, and we present explicit results for the quark-antiquark correlations in the single-pair production regime. We reserve a detailed discussion of the double-pair production regime for the next paper in this sequenceeng© The Author(s) 2018. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are creditedhttp://creativecommons.org/licenses/by/4.0Perturbative QCDQuark-GluonPlasma Resummationjournal article10.1007/JHEP07(2018)003open access