A New Strong Interaction Sector as the origin for the Dark Energy and Dark Matter

A new strong interaction sector is proposed as a possible origin for the Dark Energy and Dark matter. It is described by an unbroken gauge group $SU(2{)}_Z$ which grows strong at a scale ${\mathrm{\Lambda }}_Z\sim {10}^{-3}eV$ provided its coupling is of the order of the electroweak coupling at some high energy scale (either $\sim {10}^{16}GeV$ or $\sim O(TeV)$ . The present vacuum energy which is consistent with a cosmological constant is related to ${\mathrm{\Lambda }}_Z$ and one of the $SU(2{)}_Z$ ``matter fields’’ provides a candidate for the Dark Matter in the form of a weakly interacting massive particle (WIMP) with an annihilation cross section naturally of the order of the electroweak one at the time of its decoupling.