  We study the Bethe-Salpeter equations for spin zero diquark composites in the
color superconducting phase of N_f=2 cold dense QCD. The explicit form of the
spectrum of the diquarks, containing an infinite tower of narrow (at high
density) resonances, is derived. It is argued that there are five
pseudo-Nambu-Goldstone bosons (pseudoscalars) that remain almost massless at
large chemical potential. These five pseudoscalars, along with the massless
quarks of the third color should play an important role in the infrared
dynamics of N_f=2 dense QCD.

High Energy Physics - Phenomenology;High Energy Physics - Theory;Nuclear Theory