Initializing Conserved Charges in the Initial State of Heavy-Ion Collisions

While it is well known that there is a significant amount of quark anti-quark pairs in the initial state of nuclear collisions, the production of these due to gluon splitting has yet to be thoroughly investigated. The ICCING (Initial Conserved Charges in Nuclear Geometry) algorithm reconstructs these quark distributions, providing conserved baryon, strange, and electric charges, by sampling a given model for the gluon to quark/antiquark splitting function over the initial energy density, which is valid at top collider energies, even when baryon chemical potential equals zero. There is a substantial difference between the charge and energy densities that indicates sensitivity to different geometries of the initial state. The ICCING algorithm includes fluctuations in the gluon longitudinal momenta, a structure that supports the implementation of dynamical processes, and the c++ version is now open-source. Further development is done through the inclusion of pre-hydrodynamic evolution that introduces locally dependent density fluctuations that propagate spatially.