  The single particle spectral function for the normal state of underdoped high
$T_c$ cuprates is studied within the slave particle framework. We find that the
presence of a massless dynamical gauge field - a direct consequence of the
quantum order - explains the broad, but not totally incoherent, line-shapes
observed in experiments. The issue of the negative anomalous dimension of a
recently proposed gauge invariant single particle amplitude is also considered.
We show how the anomalous behavior of the single particle amplitude can be
incorporated within the slave particle approach and, thus reinterpreted, lead
to physical phenomenology.
