NANOGrav results and Dark First Order Phase Transitions

Andrea Addazi; Antonino Marciano; Kaiqiang Zeng; Qingyu Gan; Yi-Fu Cai

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NANOGrav results and Dark First Order Phase Transitions

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arxiv 2009.10327 v2 pith:RFWEVKHO submitted 2020-09-22 hep-ph gr-qc

NANOGrav results and Dark First Order Phase Transitions

Andrea Addazi , Yi-Fu Cai , Qingyu Gan , Antonino Marciano , Kaiqiang Zeng This is my paper

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keywords darkfirstfoptsmatternanogravorderphasetransitions

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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.

NANOGrav results and Dark First Order Phase Transitions

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