With null results in resonance searches at the LHC, physics potential focus is now shifting towards interpretation of nonresonant phenomena. An example such shift increased popularity EFT programme. We can embark on programme owing to good integrated luminosity and an excellent understanding detectors, which will allow these become more intense as LHC continues. In this paper, we provide a fram...

We demonstrate an important role of the process of optical rectification in the theory of nonlinear wave propagation in quadratically nonlinear [or chi(2)] periodic optical media. We derive a novel physical model for gap solitons in chi(2) nonlinear Bragg gratings.