Investigating the partonic entanglement entropy at low Bjorken‐x within Gluon saturation approach

Abstract

AbstractIn this work, the entanglement entropy is examined within the context of deep inelastic scattering in collisions. The calculation is based on a formalism where the partonic state at small‐ is maximally entangled, consisting of a large number of micro‐states occurring with equal probabilities. Analytical expressions for the number of gluons, , are considered, derived from gluon saturation models for dipole‐target amplitudes within the framework of the Quantum Chromodynamics (QCD) color dipole picture. A comparison of the entanglement entropy with thermodynamic entropy measured in and collisions at high energies is done.