  By studying the balance functions of several hadronic species, one can gain
insight into the chem-ical evolution of the Quark \textendash Gluon Plasma and
radial flow. In a picture of early hadronisation,pairs of particles and
anti-particles (created at the same space \textendash time point) are separated
furtherin rapidity due to the higher initial temperature and diffusive
interactions with other particles.Therefore delayed hadronisation will lead to
strong correlations in rapidity in the final state. In this work, balance
functions for identified charged-pion pairs measured by the ALICE detector
atthe Large Hadron Collider (LHC) in Pb \textendash Pb collisions at
\sqrt{s_{NN}} = 2.76 TeV are presented. These balance functions are presented
in relative rapidity (\Delta y) and relative azimuthal angle (\Delta \varphi).
It isobserved that the charged-pion balance function widths in \Delta y and
\Delta \varphi get narrower in central Pb \textendash Pb collisions compared to
peripheral collisions. The findings in this analysis are consistent withthe
effects of delayed hadronisation and radial flow.
