Torsion braneworlds in a tensor-vector gravity

In this paper, we study the properties of gravity and bulk fields living in a torsion warped braneworld. The torsion is driven by a background vector whose norm provides a source for the bulk cosmological constant. For a vector as the derivative of a scalar field, we find new isotropic thick brane geometry. We analyze the features of bosonic and fermionic fields in this scenario. The background vector provides nonminimal coupling between the fields and the geometry leading to modifications in the Kaluza-Klein (KK) states. For a scalar field, the background vector breaks the Z(2) symmetry, whereas for the vector gauge field, a geometric coupling to the torsion tensor traps the massless mode. The spinor connection is modified by the torsion and a geometric derivative Yukawa-like coupling is proposed. The effects of these new couplings are investigated.

Automated summary

This paper studies the properties of gravity and bulk fields living in a torsion warped braneworld. The authors find a new isotropic thick brane geometry and analyze the features of bosonic and fermionic fields in this scenario. The nonminimal coupling between the fields and the geometry, provided by the background vector, leads to modifications in the Kaluza-Klein states.