  We study the effects of Lorentz symmetry violation on the scalar CMBR
bispectrum. Our quantitative results show that there can be enhancements in the
bispectrum for specific configurations in momentum space, when the modified
dispersion relations resulting from the symmetry breaking violate the adiabatic
condition for a short period of time in the early Universe. The kind of
configurations that are enhanced and the pattern of oscillations in wavenumbers
that generically appear in the bispectrum strictly depend on the form of the
modified dispersion relation, and therefore on the pattern of Lorentz
violation. These effects are found to be distinct from those that appear when
modelling very high-energy (transplanckian) physics via modified boundary
conditions (modified vacuum). In fact, under certain conditions, the
enhancements are even stronger, and possibly open a door to the experimental
study of Lorentz violation through these phenomena.
