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Ren, J; He, HJ; Ren, J (reprint author), Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China.
Probing gravitational dark matter
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Language英语
KeywordDark Matter Theory Quantum Gravity Phenomenology
AbstractSo far all evidences of dark matter (DM) come from astrophysical and cosmological observations, due to the gravitational interactions of DM. It is possible that the true DM particle in the universe joins gravitational interactions only, but nothing else. Such a Gravitational DM (GDM) may act as a weakly interacting massive particle (WIMP), which is conceptually simple and attractive. In this work, we explore this direction by constructing the simplest scalar GDM particle chi(s). It is a Z(2) odd singlet under the standard model (SM) gauge group, and naturally joins the unique dimension-4 interaction with Ricci curvature, xi(s)chi R-2(s), where xi(s) the dimensionless nonminimal coupling. We demonstrate that this gravitational interaction xi(s)chi R-2(s), together with Higgs-curvature nonminimal coupling term xi H-h(dagger) HR, induces effective couplings between chi(2)(s) and SM fields, and can account for the observed DM thermal relic abundance. We analyze the annihilation cross sections of GDM particles and derive the viable parameter space for realizing the DM thermal relic density. We further study the direct/indirect detections and the collider signatures of such a scalar GDM. These turn out to be highly predictive and testable.
2015
Issue3Pages:52
Subject AreaAstronomy & Astrophysics ; Physics
DOIhttp://dx.doi.org/10.1088/1475-7516/2015/03/052
Indexed BySCI
Funding OrganizationNational NSF of China [11275101, 11135003] ; National NSF of China [11275101, 11135003] ; National NSF of China [11275101, 11135003] ; National NSF of China [11275101, 11135003] ; National Basic Research Program [2010CB833000] ; National Basic Research Program [2010CB833000] ; National Basic Research Program [2010CB833000] ; National Basic Research Program [2010CB833000]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/21074
CollectionSCI期刊论文
Corresponding AuthorRen, J (reprint author), Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Ren, J,He, HJ,Ren, J . Probing gravitational dark matter[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2015(3):52.
APA Ren, J,He, HJ,&Ren, J .(2015).Probing gravitational dark matter.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(3),52.
MLA Ren, J,et al."Probing gravitational dark matter".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .3(2015):52.
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