A model for spin-charge-separated superconductivity in two dimensions
is introduced where the phases of the spinon and holon order parameter
s couple guage invariantly to a statistical gauge field representing c
hiral spin fluctuations. The model is analyzed in the continuum limit
and in the low-temperature limit. In both cases we find that physical
electronic phase correlations show a superconducting-normal phase tran
sition of the Berezinskii-Kosterlitz-Thouless type, while statistical
gauge-field excitations are found to be strictly gapless. It is argued
that the former transition is in the same universality class as that
of the XY model. We thus predict a universal jump in the superfluid de
nsity at this transition. The normal-to-superconductor phase boundary
for this model is also obtained as a function of carrier density, wher
e we find that its shape compares favorably with that of the experimen
tally observed phase diagram for the oxide superconductors.