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题名: Pure gravitational dark matter, its mass and signatures
作者: Tang, Y ;  Wu, YL
刊名: PHYSICS LETTERS B
出版日期: 2016
卷号: 758, 页码:402-406
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1016/j.physletb.2016.05.045
通讯作者: Tang, Y (reprint author), Korea Inst Adv Study, Seoul 02455, South Korea.
文章类型: Article
英文摘要: In this study, we investigate a scenario that dark matter (DM) has only gravitational interaction. In the framework of effective field theory of gravity, we find that DM is still stable at tree level even if there is no symmetry to protect its longevity, but could decay into standard model particles due to gravitational loop corrections. The radiative corrections can lead to both higher-and lower-dimensional effective operators. We also first explore how DM can be produced in the early universe. Through gravitational interaction at high temperature, DM is then found to have mass around TeV less than or similar to m(X) less than or similar to 10(11) GeV to get the right relic abundance. When DM decays, it mostly decays into gravitons, which could be tested by current and future CMB experiments. We also estimate the resulting fluxes for cosmic rays, gamma-ray and neutrino. (C) 2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).
类目[WOS]: Astronomy & Astrophysics ;  Physics, Nuclear ;  Physics, Particles & Fields
收录类别: SCI
项目资助者: National Research Foundation of Korea [NRF-2015R1A2A1A05001869]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21596
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Tang, Y,Wu, YL. Pure gravitational dark matter, its mass and signatures[J]. PHYSICS LETTERS B,2016,758:402-406.
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