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题名: Probing gravitational dark matter
作者: Ren, J;  He, HJ
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2015
期号: 3, 页码:52
关键词: dark matter theory ;  quantum gravity phenomenology
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1088/1475-7516/2015/03/052
通讯作者: Ren, J (reprint author), Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China.
文章类型: Article
英文摘要: So 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.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: EQUIVALENCE THEOREM ;  PRECISE FORMULATION ;  STANDARD MODEL ;  ATLAS DETECTOR ;  HIGGS-BOSON ;  SEARCH ;  ENERGIES ;  LHC
收录类别: SCI
项目资助者: National NSF of China [11275101, 11135003] ;  National Basic Research Program [2010CB833000]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21074
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Recommended Citation:
Ren, J,He, HJ. Probing gravitational dark matter[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2015(3):52.
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