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arXiv · 2402.11902

Affleck-Dine leptogenesis scenario for resonant production of sterile neutrino dark matter

Kentaro Kasai·Masahiro Kawasaki·Kai Murai
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Abstract

Sterile neutrino is a fascinating candidate for dark matter. In this paper, we examine the Affleck-Dine (AD) leptogenesis scenario generating a large lepton asymmetry, which can induce the resonant production of sterile neutrino dark matter via the Shi-Fuller (SF) mechanism. We also revisit the numerical calculation of the SF mechanism and the constraints from current X-ray and Lyman-$\alpha$ forest observations. We find that the AD leptogenesis scenario can explain the production of sterile neutrino dark matter by incorporating a non-topological soliton with a lepton charge called L-ball. Finally, we discuss an enhancement of second-order gravitational waves at the L-ball decay and investigate the testability of our scenario with future gravitational wave observations.

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Kentaro Kasai, Masahiro Kawasaki, Kai Murai. 2024-02-19. Affleck-Dine leptogenesis scenario for resonant production of sterile neutrino dark matter. https://arxiv.org/abs/2402.11902

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