  Jet quenching of quarks and gluons in central A+A collisions suppresses the
high-p_T meson production and exposes novel baryon dynamics that we attribute
to (gluonic) baryon junctions. This mechanism predicts baryon enhancement in a
finite moderate-p_T window that decreases with increasing impact parameter. We
also extend recent calculations of the transverse momentum behavior of p/pi^+
and p-bar/pi^- to other baryon species and show that a similar pattern is
expected for the K^-/Lambda and K^+/bar{Lambda} ratios. Within the framework of
the model constant p-bar/p and bar{Lambda}/Lambda ratios are found in central
Au+Au collisions at RHIC energies up to p_T ~= 4 - 5 GeV.
