{"arxiv_id":"hep-th/0407149","incoming":{"papers":87,"sentences":151,"groups":[{"kind":"extends","label":"Builds on it","papers":1,"sentences":1,"quotes":[{"arxiv_id":"0904.0809","title":"Aether Unleashed","url":"/paper/0904.0809","section":"Generalities","sentence":"Setting $V≡0$ one recovers the class of vector-tensor theories studied in [ref] , while replacing the potential ([ref]) by a fixed-norm constraint leads to a subclass of the Einstein-aether models considered in [ref] , and the vector field theories studied by Carroll and Lim [ref] .[Our parameters are related to those of [ref] by $β_13≡β_1+β_3$, $β≡β_1+β_2+β_3$, and by those of [ref] by $β_1≡2ϵ-τ$, $β≡-τ$, $β_13≡η-τ$ and $β_4≡ω$.] Although a fixed normed constraint seems to be difficult to justify from a particle physics perspective, general potentials $V(A_μA^μ)$ have been argued to appear in theories in which gauge invariance is spontaneously broken [ref] , and a fixed-norm constraint can be naively recovered from a potential of the form ([ref]), at least classically, by taking the limit $λ→∞$ (we shall make this connection more explicit below.)","intent_p":0.85,"contests_p":null}]},{"kind":"method_or_tool","label":"Uses its method or tool","papers":1,"sentences":1,"quotes":[{"arxiv_id":"0812.1231","title":"Instability of the ACW model, and problems with massive vectors during inflation","url":"/paper/0812.1231","section":"Solutions to the linearized equations for the perturbations","sentence":"In this way we obtain an expression for $λ$ in terms of the vector field and the metric (this is the procedure also adopted in [ref] to study a similar model, and it has the advantage that we do not have to introduce explicitly the perturbation of the lagrange multiplier).","intent_p":0.99,"contests_p":null}]},{"kind":"data_used","label":"Uses its data or values","papers":6,"sentences":6,"quotes":[{"arxiv_id":"1305.0009","title":"Cosmological constraints on Lorentz violating dark energy","url":"/paper/1305.0009","section":"Lorentz breaking theories of gravity and $$CDM","sentence":"G_cos≡1/8πM_0^2(1+β/2+3λ/2) differing from the value $G_N$ measured e.g. on earth or in the Solar System[The analysis of Big Bang Nucleosynthesis [ref] sets a bound on the relative difference between the two, $|G_cos/G_N-1|≤0.13$.], given by Eq. 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Pith's classifier typed each sentence. A label is shown at intent probability 0.8 or more (0.95 for support), a contest at 0.7 or more. Measured accuracy against two blind model families is at https://pith.science/accuracy. 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A later paper is listed under a label only when the classifier gives one of its sentences that label at intent probability 0.8 or more (0.95 for support), Pith's reading of the sentence finds that the citing paper itself did it, and a second check of the paraphrase against the sentence passes. The section lists uses only: building on the paper, using its method, tool, data or values, comparing with it and citing it as support. It does not list criticism or disagreement, so their absence says nothing about how the paper has been received. Code counted the papers, wrote the summary from the listed entries, set the evidence level and linked each entry to its citing paper. Quotes are copied from the citing sentence and shown only when the citing paper's licence is CC BY, CC BY-SA or CC0; otherwise the paraphrase is shown. Papers that share an author with this one are listed apart. A paper with fewer citing papers gets a line counted by code, which names uses only: a later paper whose only label is a contest is counted as not described.","line":null,"summary":"1 later paper by other authors is listed below: 1 compared its own results with it."},"_links":{"html":"https://pith.science/paper/hep-th/0407149"}}