Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-04-02
J.Phys.Conf.Ser.171:012041,2009
Physics
High Energy Physics
High Energy Physics - Theory
Presented at DISCRETE '08, Symposium on Prospects in the Physics of Discrete Symmetries, 11-16 December 2008, IFIC, Valencia,
Scientific paper
10.1088/1742-6596/171/1/012041
We present a model of gravity based on spontaneous Lorentz symmetry breaking. We start from a model with spontaneously broken symmetries for a massless 2-tensor with a linear kinetic term and a nonderivative potential, which is shown to be equivalent to linearized general relativity, with the Nambu-Goldstone (NG) bosons playing the role of the gravitons. We apply a bootstrap procedure to the model based on the principle of consistent coupling to the total energy energy-momentum tensor. Demanding consistent application of the bootstrap to the potential term severely restricts the form of the latter. Nevertheless, suitable potentials exists that permit stable vacua. It is shown that the resulting model is equivalent, at low energy, to General Relativity in a fixed gauge.
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