Hybridization wave as the ``Hidden Order'' in URu$_{2}$Si$_{2}$

A phenomenological model for the hidden order transition in the heavy Fermion material URu$_{2}$Si$_{2}$ is introduced. The model assumes an incommensurate, momentum-carrying hybridization between the light hole band and the heavy electron band, appearing after a Fano hybridization takes place. The hybridization wave is identified as the ``Hidden Order'' order parameter. The model, simplified to one dimension, qualitatively reproduces numerous experimental results obtained from e.g. neutron scattering and scanning tunneling microscopy, and mainly the gap-like features in the density of states and the appearance of features at an incommensurate vector $Q^*\sim 0.6 \pi/a_0$. Finally, the model allows us to make various predictions which are amenable to current experiments.