Leptogenesis and dark matter through relativistic bubble walls with observable gravitational waves

Journal of High Energy Physics

Regular Article - Theoretical Physics

Debasish Borah¹  Indrajit Saha¹  Arnab Dasgupta² 

[1] Department of Physics, Indian Institute of Technology Guwahati, 781039, Assam, India;Pittsburgh Particle Physics, Astrophysics, and Cosmology Center, Department of Physics and Astronomy, University of Pittsburgh, 15206, Pittsburgh, PA, USA;

关键词: Phase Transitions in the Early Universe;    Baryo-and Leptogenesis;    Particle Nature of Dark Matter;   

DOI  :  10.1007/JHEP11(2022)136

 received in 2022-09-22, accepted in 2022-11-15,  发布年份 2022

来源: Springer

【 摘 要 】

We study a scenario where both dark matter and heavy right handed neutrino (RHN) responsible for leptogenesis acquire masses by crossing the relativistic bubble walls formed as a result of a TeV scale supercooled first order phase transition (FOPT). While this leads to a large out-of-equilibrium abundance of right handed neutrino inside the bubble sufficient to produce the required lepton asymmetry, the dark matter being lighter can still remain in equilibrium with its relic being set by subsequent thermal freeze-out. A classical conformal symmetry ensures the origin of mass via FOPT induced by a singlet scalar while also ensuring supercooling leading to enhanced gravitational wave amplitude within the sensitivity of the LISA experiment. A minimal scenario with three RHN, one inert scalar doublet and one singlet scalar as additional fields beyond the standard model is sufficient to realize this possibility which also favours inert RHN dark matter over inert scalar doublet.

【 授权许可】

Unknown   
© The Author(s) 2022