Vector Mesons on the Light Front

We apply the light-front quantization to the Nambu--Jona-Lasinio model with the vector interaction, and compute vector meson's mass and light-cone wavefunction in the large N limit. Following the same procedure as in the previous analyses for scalar and pseudo-scalar mesons, we derive the bound-state equations of a q-qbar system in the vector channel. We include the lowest order effects of the vector interaction. The resulting transverse and longitudinal components of the bound-state equation look different from each other. But eventually after imposing an appropriate cutoff, one finds these two are identical, giving the same mass and the same (spin-independent) light-cone wavefunction. Mass of the vector meson decreases as one increases the strength of the vector interaction.Comment: 11 pages, 3 figures, discussion on the cutoff scheme changed, Fig.3 replaced, and one reference adde

Color Glass Condensate in QCD at High Energy

I give a brief review about the color glass condensate, which is the universal form of hadrons and nuclei at high energies.Comment: 4 pages, talk presented at ICHEP2004, Beijing, China, August 2004, minor modificatio