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arXiv 1002.3373hep-thastro-ph.COgr-qc
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Horava-Lifshitz引力运行参数λ的观测约束

Overall observational constraints on the running parameter λof Horava-Lifshitz gravity

Sourish Dutta, Emmanuel N. Saridakis

摘要:

我们使用Ia型超新星(SNIa),重子声学振荡(BAO)和宇宙微波背景(CMB)的观测数据,以及大爆炸核合成(BBN)的要求,以约束运行参数$λ$的Horava-Lifshitz引力,它决定了紫外线和红之间的流动。我们考虑引力扇区的详细和非细致平衡版本,并且我们包括物质和辐射扇区。允许的理论的所有参数的变化,我们构建的似然轮廓,我们得出结论,在$1σ$的信心$λ$仅限于$|λ-1|\lesssim0.02$,而它的最佳拟合值是$|λ_{b.f}-1|\approx0.002$。虽然这种观测分析限制运行参数$λ$非常接近其IR值1,它并没有启发有关理论的可能的概念和理论问题的讨论。

英文摘要:

We use observational data from Type Ia Supernovae (SNIa), Baryon Acoustic Oscillations (BAO), and Cosmic Microwave Background (CMB), along with requirements of Big Bang Nucleosynthesis (BBN), to constrain the running parameter $λ$ of Horava-Lifshitz gravity, which determines the flow between the Ultra-Violet and the Infra-Red. We consider both the detailed and non-detailed balance versions of the gravitational sector, and we include the matter and radiation sectors. Allowing for variation of all the parameters of the theory, we construct the likelihood contours and we conclude that in $1σ$ confidence $λ$ is restricted to $|λ-1|\lesssim0.02$, while its best fit value is $|λ_{b.f}-1|\approx0.002$. Although this observational analysis restricts the running parameter $λ$ very close to its IR value 1, it does not enlighten the discussion about the theory's possible conceptual and theoretical problems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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