Higher spin gravitational couplings: Ghosts in the Yang-Mills detour complex
| Autor: | K. Hallowell, A. R. Gover, Andrew Waldron |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Nuclear and High Energy Physics Quantum field theory in curved spacetime Scalar (mathematics) Degenerate energy levels Graviton Yang–Mills theory Gravitation Massless particle High Energy Physics::Theory General Relativity and Quantum Cosmology Theoretical physics Classical mechanics Conformal geometry |
| Zdroj: | Physical Review D. 75 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.75.024032 |
| Popis: | Gravitational interactions of higher spin fields are generically plagued by inconsistencies. There exists however, a simple framework that couples higher spins to a broad class of gravitational backgrounds (including Ricci flat and Einstein) consistently at the classical level. The model is the simplest example of a Yang-Mills detour complex and has broad mathematical applications, especially to conformal geometry. Even the simplest version of the theory, which couples gravitons, vectors and scalar fields in a flat background is rather rich, providing an explicit setting for detailed analysis of ghost excitations. Its asymptotic scattering states consist of a physical massless graviton, scalar, and massive vector along with a degenerate pair of zero norm photon excitations. Coherent states of the unstable sector do have positive norms, but their evolution is no longer unitary and amplitudes grow with time. The class of models proposed is extremely general and of considerable interest for ghost condensation and invariant theory. |
| Databáze: | OpenAIRE |
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