Constraints on a special running vacuum model

被引：10
作者：
Geng, Chao-Qiang [1 ,2 ,3 ,4 ]
Lee, Chung-Chi [5 ]
Yin, Lu [3 ]
机构：
[1] UCAS, Sch Fundamental Phys & Math Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China
[2] Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China
[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan
[4] Natl Ctr Theoret Sci, Hsinchu 300, Taiwan
[5] Univ Cambridge, DAMTP, Ctr Math Sci, Wilberforce Rd, Cambridge CB3 0WA, England
来源：
EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 01期
关键词：
BARYON ACOUSTIC-OSCILLATIONS; POWER SPECTRUM; ENERGY; PERTURBATION; GALAXIES; LAMBDA;
D O I：
10.1140/epjc/s10052-020-7653-z
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We study a special running vacuum model (RVM) with =3 alpha H2+3 beta H04H-2+ where alpha, beta are the model parameters and H is the Hubble one. This RVM has non-analytic background solutions for the energy densities of matter and radiation, which can only be evaluated numerically. From the analysis of the CMB power spectrum and baryon acoustic oscillation along with the prior of alpha>0 to avoid having a negative dark energy density, we find that alpha<2.83x10-4 and beta=(-0.2-4.5+3.9)x10-4 C.L.). We show that the RVM fits the cosmological data comparably to the ?CDM In addition, we relate the fluctuation amplitude sigma 8 to the neutrino mass sum Sigma m nu(.)
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页数：8
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