  We present a near-infrared J and K photometric catalog containing more than
73,000 stars in the central region of the giant Globular Cluster omega
Centauri. This is the largest IR data-set ever published for this cluster and
has been used to completely characterize the morphology and the properties of
the Red Giant Branch (RGB). In particular, we concentrated our attention on (i)
the anomalous RGB (RGB-a), recently discovered in this cluster and (ii) the RGB
of the dominant metal poor population (RGB-MP) in both the infrared (K,J-K) and
optical-infrared (K,V-K) color magnitude diagrams. The full set of
morphological parameters and photometric indices has been measured and compared
with the empirical relations by Ferraro et al. (2000). We find that the
detailed photometric properties of the RGB-a are in full agreement with the
recent spectroscopic metallicity estimates, that place it at the metal-rich
extreme of the stellar population mix in omega Centauri.
