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A temperature-dependent mass of right handed neutrinos (RHNs) is induced by an early phase transition at temperature \(T_*\)  that eventually stabilizes to a constant value through the Higgs vacuum expectation value after electroweak symmetry breaking (EWSB). This mass variation allows RHNs to acquire a mass below the electroweak scale ( \({\sim }100\) GeV) at zero temperature while still generating sufficient baryon asymmetry near \(T_*\) . Notably, a low RHN mass at \(T=0\) enhances detection prospects. Furthermore, a primordial lepton asymmetry can be accommodated in this framework after EWSB, as indicated by helium abundance measurements.

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Phase Transition-Driven Leptogenesis

  • 会议论文

  • 发表日期：

    2025年

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  • Dipendu Bhandari,
  • Arghyajit Datta,
  • Arunansu Sil

摘要

A temperature-dependent mass of right handed neutrinos (RHNs) is induced by an early phase transition at temperature \(T_*\)  that eventually stabilizes to a constant value through the Higgs vacuum expectation value after electroweak symmetry breaking (EWSB). This mass variation allows RHNs to acquire a mass below the electroweak scale ( \({\sim }100\) GeV) at zero temperature while still generating sufficient baryon asymmetry near \(T_*\) . Notably, a low RHN mass at \(T=0\) enhances detection prospects. Furthermore, a primordial lepton asymmetry can be accommodated in this framework after EWSB, as indicated by helium abundance measurements.