Cosmological Implications of 5-dimensional Brans-Dicke Theory

Li-e Qiang; Xuelei Chen; Yan Gong; Yongge Ma

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Cosmological Implications of 5-dimensional Brans-Dicke Theory

Li-e Qiang, Yan Gong, Yongge Ma, Xuelei Chen

Cosmology and Nongalactic Astrophysics · Submitted 10 Oct 2009

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We find that the best fit value of the 5-dimensional Brans-Dicke coupling contant is $\omega = -1.9$.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,117 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.09 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.44 · mentions code or data availability 0.02.

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The five dimensional Brans-Dicke theory naturally provides two scalar fields by the Killing reduction mechanism. These two scalar fields could account for the accelerated expansion of the universe. We test this model and constrain its parameter by using the type Ia supernova (SN Ia) data. We find that the best fit value of the 5-dimensional Brans-Dicke coupling contant is $\omega = -1.9$. This result is also consistent with other observations such as the baryon acoustic oscillation (BAO).

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What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	The five dimensional Brans-Dicke theory naturally provides two scalar fields by the Killing reduction mechanism.	background 0.79	0.13	0.05	asserted 1.00
s1	These two scalar fields could account for the accelerated expansion of the universe.	interpretation 0.61	0.11	0.23	hedged possibility 1.00
s2	We test this model and constrain its parameter by using the type Ia supernova (SN Ia) data.	method 0.94	0.96	0.04	asserted 0.99
s3	We find that the best fit value of the 5-dimensional Brans-Dicke coupling contant is $\omega = -1.9$.	result 1.00	0.97	0.63	asserted 1.00
s4	This result is also consistent with other observations such as the baryon acoustic oscillation (BAO).	interpretation 0.62	0.54	0.13	hedged possibility 0.91

What kind of paper the classifier reports this is: theoretical result 0.60 · evidence from analysis of existing data 1.00.

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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

The five dimensional Brans-Dicke theory naturally provides two scalar fields by the Killing reduction mechanism. These two scalar fields could account for the accelerated expansion of the universe. We test this model and constrain its parameter by using the type Ia supernova (SN Ia) data. We find that the best fit value of the 5-dimensional Brans-Dicke coupling contant is $\omega = -1.9$. This result is also consistent with other observations such as the baryon acoustic oscillation (BAO).

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4 arXiv papers cite this in 7 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

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Although, we do not require the introduction of a self interacting potential in $4D$ or matter in $5D$, the range of $ω$ obtained in our work is consistent with the one obtained by a number of authors in the literature in the context of several cosmological models and different versions of BD theory in $4D$ and $5D$ [ref] - [ref] : In all cases cosmic accelerated expansion requires $ω< - 1$.

Brans-Dicke Cosmology in 4D from scalar-vacuum in 5D · Summary · 0.96

Cites it as background 2 papers

For non-perturbative quantization, see for example [ref] .

The no-boundary measure in scalar-tensor gravity · The no-boundary measure in scalar-tensor gravity: Formalism · 0.96
The scalar-tensor structure of this theory has been considered as a source of inflation and primordial inhomogeneities of space-time [ref] , dark energy [ref] and in the context of stability of stars [ref] .

A comparison between Jordan and Einstein frames of Brans-Dicke gravity a la loop quantum cosmology · Introduction · 0.85

What it cites · 3 sentences without a confident label

Uses data or values from 1 paper

We use the SN Ia data recently published by the Supernova Cosmology Project (SCP) team [ref] .

Improved Cosmological Constraints from New, Old and Combined Supernova Datasets · Observational Test · 1.00

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