Journal
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
Volume 64, Issue 9, Pages -Publisher
SCIENCE PRESS
DOI: 10.1007/s11433-021-1724-6
Keywords
gravitational waves; first order phase transitions; warm dark matter; effective field theory
Categories
Funding
- Talent Scientific Research Program of College of Physics, Sichuan University [1082204112427]
- National Natural Science Foundation of China (NSFC) [11653002, 11961131007, 1201101448, 11722327, 11421303]
- China Association for Science and Technology-Young Elite Scientist Sponsorship [2016QNRC001]
- National Youth Talents Program of China
- Fundamental Research Funds for Central Universities
- Chinese Scholarship Council Innovation Talent Funds
- University of Science and Technology of China (USTC) Fellowship for International Cooperation
- Shanghai Municipality [KBH1512299]
- Fudan University [JJH151210]
- NSFC [11875113]
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The recent NANOGrav evidence hints at gravitational waves radiation from the Early Universe, which may be produced from first order phase transitions around a temperature in the keV-MeV window. Such phase transitions at temperatures much lower than the electroweak scale can be naturally envisaged in several warm dark matter models.
The recent NANOGrav evidence of a common-source stochastic background provides a hint to gravitational waves (GW) radiation from the Early Universe. We show that this result can be interpreted as a GW spectrum produced from first order phase transitions (FOPTs) around a temperature in the keV-MeV window. Such a class of FOPTs at temperatures much below the electroweak scale can be naturally envisaged in several warm dark matter models such as Majoron dark matter.
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