A note on the total action of 4D Gauss–Bonnet theory
Apr 20, 202015 pages
Published in:
- Eur.Phys.J.C 80 (2020) 10, 992
- Published: Oct 27, 2020
e-Print:
- 2004.09214 [gr-qc]
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Abstract: (Springer)
Recently, a novel four-dimensional Gauss–Bonnet theory has been suggested as a limiting case of the original D-dimensional theory with singular Gauss–Bonnet coupling constant . The theory is proposed at the level of field equations. Here we analyse this theory at the level of action. We find that the on-shell action and surface terms split into parts, one of which does not scale like . The limiting procedure, therefore, gives unphysical divergences in the on-shell action and surface terms in four dimensions. We further highlight various issues related to the computation of counterterms in this theory.Note:
- 15 pages; general discussion extended; typos corrected; references added. Published version
- dimension: 4
- surface
- coupling constant
- field equations
- Gauss-Bonnet term
- gravitation: model
- gravitation: action
- model: on-shell
- Lagrangian formalism
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