Brane Lorentz Symmetry from Lorentz Breaking in the Bulk
O. Bertolami, C. Carvalho
TL;DR
This paper introduces a mechanism where spontaneous breaking of bulk Lorentz symmetry via a vector field leads to a selective bulk dimension invisibility, potentially explaining why certain dimensions are hidden from the Standard Model.
Contribution
It proposes a novel spontaneous symmetry breaking mechanism in the bulk that results in selective invisibility of extra dimensions to Standard Model particles.
Findings
Bulk Lorentz symmetry can be spontaneously broken by a vector field.
Conditions for induced Lorentz symmetry on the brane are derived.
The mechanism explains the invisibility of certain bulk dimensions.
Abstract
We propose the mechanism of spontaneous symmetry breaking of a bulk vector field as a way to generate the selection of bulk dimensions invisible to the standard model confined to the brane. By assigning a non-vanishing vacuum value to the vector field, a direction is singled out in the bulk vacuum, thus breaking the bulk Lorentz symmetry. We present the condition for induced Lorentz symmetry on the brane, as phenomenologically required.
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