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arxiv: hep-th/0307109 · v3 · submitted 2003-07-11 · ✦ hep-th · gr-qc

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Spinor Gravity

A.Hebecker , C.Wetterich
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classification ✦ hep-th gr-qc
keywords gravityspinorgravitationalonlyarisesbeyondcomparedcompatible
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A unified description of all interactions could be based on a higher-dimensional theory involving only spinor fields. The metric arises as a composite object and the gravitational field equations contain torsion-corrections as compared to Einstein gravity. Lorentz symmetry in spinor space is only global, implying new goldstone-boson-like gravitational particles beyond the graviton. However, the Schwarzschild and Friedman solutions are unaffected at one loop order. Our generalized gravity seems compatible with all present observations.

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Cited by 1 Pith paper

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  1. Emergence of dynamical tensor fields in composite models of gravity

    hep-th 2025-12 unverdicted novelty 6.0

    Auxiliary tensor fields in composite gravity models acquire dynamical kinetic terms via FRG flows, reproducing the transverse-traceless quadratic Einstein-Hilbert structure in the spin-2 sector.