  Multi-pion correlations and wavepacket size effects on the pion multiplicity
distribution, pion momentum distribution and two-pion interferometry are
studied. It is shown that multi-pion Bose-Einstein correlations and the
wavepacket size cause an abundance of pions at low momentum, increase the mean
pion multiplicity and decrease both the apparent radius of the source and the
coherent source parameter derived from two-pion interferometry.
