Unification and local baryon number

We investigate the possibility to find an ultraviolet completion of the simple extensions of the Standard Model where baryon number is a local symmetry. In the context of such theories one can understand the spontaneous breaking of baryon number at the low scale and the proton stability. We find a simple theory based on SU(4)(C) circle times SU(3)(L)circle times SU(3)(R) where baryon number is embedded in a non-Abelian gauge symmetry. We discuss the main features of the theory and the possible implications for experiments. This theory predicts stable colored and/or fractional electric charged fields which can give rise to very exotic signatures at the Large Hadron Collider experiments such as CMS and ATLAS. We further discuss the embedding in a gauge theory based on SU(4)(C) circle times SU(4)(L) circle times SU(4)(R) which could define the way to achieve the unification of the gauge interactions at the low scale. (c) 2017 The Author(s). Published by Elsevier B.V.