  The HBT radii extracted in p-pbar and pp collisions at SPS and Tevatron show
a clear correlation with the charged particle rapidity density. We propose to
explain the correlation using a simple model where the distance from the
initial hard parton-parton scattering to the hadronization point depends on the
energy of the partons emitted. Since the particle multiplicity is correlated
with the mean energy of the partons produced we can explain the experimental
observations without invoking scenarios that assume a thermal fireball. The
model has been applied with success to the existing experimental data both in
the magnitude and the intensity of the correlation. As well, the model has been
extended to pp collisions at the LHC energy of 14 TeV. The possibilities of a
better insight into the string spatial development using 3D HBT analysis is
discussed.
