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On thermal gravitational contribution to particle production and dark matter
Tang, Y; Wu, YL; Tang, Y (reprint author), Univ Tokyo, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan.
2017
发表期刊PHYSICS LETTERS B
卷号774页码:676-681
文章类型Article
摘要We investigate the particle production from thermal gravitational annihilation in the very early universe, which is an important contribution for particles that might not be in thermal equilibrium or/and might only have gravitational interaction, such as dark matter (DM). For particles with spin 0,1/2 and 1 we calculate the relevant cross sections through gravitational annihilation and give the analytic formulas with full mass-dependent terms. We find that DM with mass between TeV and 10(16) GeV could have the relic abundance that fits the observation, with small dependence on its spin. We also discuss the effects of gravitational annihilation from inflatons. Interestingly, contributions from inflatons could be dominant and have the same power dependence on Hubble parameter of inflation as that from vacuum fluctuation. Also, fermion production from inflaton, in comparison to boson, is suppressed by its mass due to helicity selection. (c) 2017 The Author(s). Published by Elsevier B.V.
学科领域Astronomy & Astrophysics ; Physics
资助者[16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490]
DOIhttp://dx.doi.org/10.1016/j.physletb.2017.10.034
关键词[WOS]INFLATION ; CONSTRAINTS ; CANDIDATES ; CREATION
语种英语
资助者[16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490] ; [16H06490]
WOS类目Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000414973200090
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21936
专题理论物理所SCI论文
通讯作者Tang, Y (reprint author), Univ Tokyo, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan.
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Tang, Y,Wu, YL,Tang, Y . On thermal gravitational contribution to particle production and dark matter[J]. PHYSICS LETTERS B,2017,774:676-681.
APA Tang, Y,Wu, YL,&Tang, Y .(2017).On thermal gravitational contribution to particle production and dark matter.PHYSICS LETTERS B,774,676-681.
MLA Tang, Y,et al."On thermal gravitational contribution to particle production and dark matter".PHYSICS LETTERS B 774(2017):676-681.
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