Electroweak vacuum instability and renormalized vacuum field fluctuations in Friedmann-Lemaitre-Robertson-Walker background

  title={Electroweak vacuum instability and renormalized vacuum field fluctuations in Friedmann-Lemaitre-Robertson-Walker background},
  author={Kazunori Kohri and Hiroki Matsui},
  journal={Physical Review D},
The cosmological Higgs vacuum stability has been an attractive research subject, and it is crucial to accurately follow the development of the Higgs fluctuations. In this work, we thoroughly investigate how the vacuum fluctuations of the Higgs field affect the stability of the electroweak vacuum in Friedmann-Lemaitre-Robertson-Walker (FLRW) background. Adopting adiabatic Wentzel-Kramers-Brillouin method approximation or adiabatic regularization methods, we clearly show that vacuum fluctuations… 

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