Dark matter production in Weyl R-2 inflation

doi:10.1103/PhysRevD.106.023502

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	Dark matter production in Weyl R-2 inflation
	Wang, Qing-Yang ; Tang, Yong 2; Wu, Yue-Liang
刊名	PHYSICAL REVIEW D
	2022
卷号	106 期号:2 页码:23502
关键词	PARTICLE CREATION QUANTIZED-FIELDS CONSTRAINTS ROTATION GRAVITY MASS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.106.023502
英文摘要	Dark matter and inflation are two key elements to understand the origin of cosmic structures in modern cosmology, and yet their exact physical models remain largely uncertain. The Weyl scaling invariant theory of gravity may provide a feasible scheme to solve these two puzzles jointly, which contains a massive gauge boson playing the role of dark matter candidate and allows the quadratic scalar curvature term, namely R2, to realize a viable inflationary mechanism in agreement with current observations. We ponder on the production of dark matter in the Weyl R2 model, including the contribution from the nonperturbative production due to the quantum fluctuations from inflationary vacuum and perturbative ones from scattering. We demonstrate that there are generally three parameter regions for viable dark matter production: (1) If the reheating temperature is larger than 103 GeV, then the Weyl gauge boson as dark matter can be produced abundantly with mass larger than the inflation scale ???1013 GeV. (2) Small mass region with 3 ?? 10???13 GeV for a higher reheating temperature. (3) Annihilation channel becomes important in the case of higher reheating temperature, which enables the Weyl gauge boson with a mass up to 4 ?? 1016 GeV to be produced through freeze-in.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27724]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci UCAS, Beijing 100049, Peoples R China 2.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 5.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qing-Yang,Tang, Yong,Wu, Yue-Liang. Dark matter production in Weyl R-2 inflation[J]. PHYSICAL REVIEW D,2022,106(2):23502.
APA	Wang, Qing-Yang,Tang, Yong,&Wu, Yue-Liang.(2022).Dark matter production in Weyl R-2 inflation.PHYSICAL REVIEW D,106(2),23502.
MLA	Wang, Qing-Yang,et al."Dark matter production in Weyl R-2 inflation".PHYSICAL REVIEW D 106.2(2022):23502.