ITP OpenIR  > SCI期刊论文
Narain, G; Narain, G (reprint author), Chinese Acad Sci, KITPC, Key Lab Theoret Phys, ITP, Beijing 100190, Peoples R China.
Exorcising ghosts in induced gravity
Source PublicationEUROPEAN PHYSICAL JOURNAL C
Language英语
AbstractUnitarity of the scale-invariant coupled theory of higher-derivative gravity and matter is investigated. A scalar field coupled with a Dirac fermion is taken as the matter sector. Following the idea of induced gravity the Einstein-Hilbert term is generated via dynamical symmetry breaking of scale invariance. The renormalisation group flows are computed and one-loop RG improved effective potential of scalar is calculated. The scalar field develops a new minimum via the Coleman-Weinberg procedure inducing the Newton constant and masses in the matter sector. The spin-2 problematic ghost and the spin-0 mode of the metric fluctuation get a mass in the broken phase of the theory. The energy dependence of the vacuum expectation value in the RG improved scenario implies a running for the induced parameters. This sets up platform to ask whether it is possible to evade the spin-2 ghost by keeping its mass always above the running energy scale? In broken phase this question is satisfactorily answered for a large domain of coupling parameter space where the ghost is evaded. The spin-0 mode can be made physically realisable or not depending upon the choice of the initial parameters. The induced Newton constant is seen to vanish in the ultraviolet case. By properly choosing parameters it is possible to make the matter fields physically unrealisable.
2017
Volume77Issue:10Pages:683
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1140/epjc/s10052-017-5249-z
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/21951
CollectionSCI期刊论文
Corresponding AuthorNarain, G (reprint author), Chinese Acad Sci, KITPC, Key Lab Theoret Phys, ITP, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Narain, G,Narain, G . Exorcising ghosts in induced gravity[J]. EUROPEAN PHYSICAL JOURNAL C,2017,77(10):683.
APA Narain, G,&Narain, G .(2017).Exorcising ghosts in induced gravity.EUROPEAN PHYSICAL JOURNAL C,77(10),683.
MLA Narain, G,et al."Exorcising ghosts in induced gravity".EUROPEAN PHYSICAL JOURNAL C 77.10(2017):683.
Files in This Item:
File Name/Size DocType Version Access License
Exorcising ghosts in(1417KB) 开放获取--Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Narain, G]'s Articles
[Narain, G (reprint author), Chinese Acad Sci, KITPC, Key Lab Theoret Phys, ITP, Beijing 100190, Peoples R China.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Narain, G]'s Articles
[Narain, G (reprint author), Chinese Acad Sci, KITPC, Key Lab Theoret Phys, ITP, Beijing 100190, Peoples R China.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Narain, G]'s Articles
[Narain, G (reprint author), Chinese Acad Sci, KITPC, Key Lab Theoret Phys, ITP, Beijing 100190, Peoples R China.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.