Probing gravitational dark matter

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	Probing gravitational dark matter
	Ren, J; He, HJ
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2015
期号	3 页码:52
关键词	dark matter theory quantum gravity phenomenology
通讯作者	Ren, J (reprint author), Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China.
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.
学科主题	Astronomy & Astrophysics ; Physics
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
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21074]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Ren, J,He, HJ. Probing gravitational dark matter[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2015(3):52.
APA	Ren, J,&He, HJ.(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.