Abstract : Particle physic is based on a theory which can be tested on the current large colliders. Measurments are in a very good agreement with this electroweak theory and no deviation is observed to indicate new physic. What is surprising today is than none of this results agreed with what is known from our universe, neither to explain the primordial baryogenesis, neither to explain the acceleration of the expansion of the Universe. In this habilitation, I come back on some results obtained in the LEP collider, to test the electroweak theory ( Higgs and W boson production) and on some measurements of CP violation. I compare then with what can be extrapoled in term of primordial baryogenesis and dark energy density and show that there is no possible agreement in the Standard Model. I finish by some experimental and theoritical prospectives to answer this fundamental question.