  We investigate the validity of the limiting-fragmentation hypothesis in
relativistic heavy-ion collisions at energies reached at the Large Hadron
Collider (LHC). A phenomenological analysis of central AuAu and PbPb collisions
based on a three-source relativistic diffusion model (RDM) is used to
extrapolate pseudorapidity distributions of produced charged hadrons from RHIC
to LHC energies into the fragmentation region. Data in this region are not yet
available at LHC energies, but our results are compatible with the
limiting-fragmentation conjecture in the full energy range sqrt(s_NN) = 19.6
GeV to 5.02 TeV.
