Confining the electroweak model to a brane

          @misc{ pirsa_PIRSA:06010023,
            doi = {10.48660/06010023},
            url = {https://pirsa.org/06010023},
            author = {Palma, Gonzalo},
            keywords = {Particle Physics, Cosmology},
            language = {en},
            title = {Confining the electroweak model to a brane},
            publisher = {Perimeter Institute},
            year = {2006},
            month = {jan},
            note = {PIRSA:06010023 see, \url{https://pirsa.org}}
          }
          

Abstract

From the Quantum Field Theory point of view, matter and gauge fields are generally expected to be localised around branes (topological defects) occurring in extra dimensions. I will discuss a simple scenario where, by starting with a five dimensional SU(3) gauge theory, we end up with several 4-D parallel braneworlds with localised 'chiral' fermions and gauge fields to them. I will show that it is possible to reproduce the electroweak model confined to a single brane, allowing a simple and geometrical approach to the hierarchy problem. Some nice results of this construction are: Gauge and Higgs fields are unified at the 5-D level; and new particles are predicted: a left-handed neutrino (with zero-hypercharge) and a massive vector field coupling together the new neutrino to other leptons.