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We study a scenario where both dark matter (DM) and heavy right-handed neutrino (RHN) responsible for leptogenesis acquire masses by crossing the relativistic bubble walls formed as a result of a supercooled first-order phase transition above electroweak scale. This leads to a large out-of-equilibrium abundance of RHN inside the bubble sufficient to produce the required lepton asymmetry. A minimal scenario with three RHN, one inert scalar doublet and one singlet scalar as additional fields beyond the standard model is sufficient to realise this possibility which also favours inert RHN DM over inert scalar doublet. While low-scale leptogenesis scenario can be probed at future gravitational wave detectors like LISA, a sufficiently high-scale leptogenesis scenario can be constrained from LIGO-VIRGO data as well.

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Leptogenesis and Dark Matter Through Relativistic Bubble Walls

  • 会议论文

  • 发表日期：

    2025年

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  • Indrajit Saha,
  • Debasish Borah,
  • Arnab Dasgupta

摘要

We study a scenario where both dark matter (DM) and heavy right-handed neutrino (RHN) responsible for leptogenesis acquire masses by crossing the relativistic bubble walls formed as a result of a supercooled first-order phase transition above electroweak scale. This leads to a large out-of-equilibrium abundance of RHN inside the bubble sufficient to produce the required lepton asymmetry. A minimal scenario with three RHN, one inert scalar doublet and one singlet scalar as additional fields beyond the standard model is sufficient to realise this possibility which also favours inert RHN DM over inert scalar doublet. While low-scale leptogenesis scenario can be probed at future gravitational wave detectors like LISA, a sufficiently high-scale leptogenesis scenario can be constrained from LIGO-VIRGO data as well.