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A comment on the matter-graviton coupling

AuthorsÁlvarez-Vázquez, Enrique ; Fernández Faedo, Antón
KeywordsHigh Energy Physics - Theory
Issue Date30-Oct-2007
CitationarXiv:0707.4221v5 [hep-th]
AbstractWe point out a generic inconsistency of the coupling of ordinary gravity as described by general relativity with matter invariant under the subgroup of unimodular diffeomorphisms (TDiffs), and some previously studied exceptions are pointed out. The most general Lagrangian invariant under TDiff up to dimension five operators is determined, and restrictions on parameters coming from existing observations are studied in some cases.
DescriptionSubmitted on 28 Jul 2007 (v1), last revised 30 Oct 2007 (this version, v5).-- 17 pages, 4 figures. References added
Appears in Collections:(IFT) Artículos
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