  The spectra observed in ARPES measurements are examined together with the
resonance peak observed in neutron scatterings, based on the slave-boson
approach to $t-t^{\prime}-J$ model. We show that the peak/dip/hump features
arise from the scattering of electrons by collective spin excitations which, at
the same time, give rise to the neutron resonance mode. The doping dependences
and the dispersions of the peak/dip/hump positions are shown to be consistent
with experiments. Our results indicate that recently observed $\cos (6\theta)$
deviation from the pure d-wave also result from the renormalization by spin
fluctuations.
