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Kang, Guang-Zhen; Zhang, De-Sheng; Jun, Li; Zong, Hong-Shi
Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model
Source PublicationCHINESE PHYSICS C
Language英语
KeywordQUANTUM-THEORY DARK ENERGY CONSTRAINTS DIMENSIONS HIERARCHY
AbstractTo solve the cosmological constant fine tuning problem, we investigate an (n+1)-dimensional generalized Randall-Sundrum brane world scenario with two (n-1)-branes instead of two 3-branes. Adopting an anisotropic metric ansatz, we obtain the positive effective cosmological constant Omega(eff) of order 10(-124) and only require a solution similar or equal to 50-50. Meanwhile, both the visible and hidden branes are stable because their tensions are positive. Therefore, the fine tuning problem can be solved quite well. Furthermore, the Hubble parameter H-1(z) as a function of redshift is in good agreement with the cosmic chronometers dataset. The evolution of the universe naturally shifts from deceleration to acceleration. This suggests that the evolution of the universe is intrinsically an extra-dimensional phenomenon. It can be regarded as a dynamic model of dark energy that is driven by the evolution of the extra dimensions on the brane.
2020
ISSN1674-1137
Volume44Issue:12Pages:125102
Cooperation Status国内
Subject AreaPhysics
MOST Discipline CataloguePhysics, Nuclear ; Physics, Particles & Fields
DOI10.1088/1674-1137/abb4cd
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27324
CollectionSCI期刊论文
Affiliation1.Yangzhou Polytech Inst, Sch Sci, Yangzhou 225127, Jiangsu, Peoples R China
2.[Kang, Guang-Zhen
3.Jun, Li
4.Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
5.Changzhou Inst Technol, Sch Sci, Changzhou 213032, Jiangsu, Peoples R China
6.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
7.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Kang, Guang-Zhen,Zhang, De-Sheng,Jun, Li,et al. Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model[J]. CHINESE PHYSICS C,2020,44(12):125102.
APA Kang, Guang-Zhen,Zhang, De-Sheng,Jun, Li,&Zong, Hong-Shi.(2020).Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model.CHINESE PHYSICS C,44(12),125102.
MLA Kang, Guang-Zhen,et al."Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model".CHINESE PHYSICS C 44.12(2020):125102.
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