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arXiv 1401.4763astro-ph.COhep-ph
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镜像物质参数的宇宙学约束

Cosmological constraints on mirror matter parameters

Paolo Ciarcelluti, Quentin Wallemacq

摘要:

本文通过对宇宙微波背景辐射和大尺度结构的数值模拟,给出了宇宙学参数的最新估计,考虑了一个平坦宇宙,其中暗物质全部或部分由镜像物质构成,原初扰动是标量绝热的,并且处于线性状态。使用马尔可夫链蒙特卡罗方法的统计分析可以获得宇宙学参数的约束。因此,我们表明,一个宇宙与纯粹的镜像暗物质是统计等效的情况下,与冷暗物质的混合物。两个宇宙学模型中,普通扇区和镜像扇区的温度比的上限都在0.3左右,这表明镜像物质的主要部分$0.06 \lesssim Ω_{\rm mirror} h^2 \lesssim 0.12$的存在。

英文摘要:

Up-to-date estimates of the cosmological parameters are presented as a result of numerical simulations of cosmic microwave background and large scale structure, considering a flat Universe in which the dark matter is made entirely or partly of mirror matter, and the primordial perturbations are scalar adiabatic and in linear regime. A statistical analysis using the Markov Chain Monte Carlo method allows to obtain constraints of the cosmological parameters. As a result, we show that a Universe with pure mirror dark matter is statistically equivalent to the case of an admixture with cold dark matter. The upper limits for the ratio of the temperatures of ordinary and mirror sectors are around 0.3 for both the cosmological models, that show the presence of a dominant fraction of mirror matter, $0.06 \lesssim Ω_{\rm mirror} h^2 \lesssim 0.12$.

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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