The theory of electroweak temperature says that when you have a plasma of particles at energy above the electroweak phase transition (100 GeV). The Higgs field would turn from nonzero vev to zero and the electroweak forces would unite and the electroweak bosons would become massless.
What happens if this occurs during a collision where only a small region reaches the electroweak transition temperature or energy, or in other words, an isolated electroweak plasma surrounded by normal vacuum, does it mean you have a region of thermal-field vacuum undergoing electroweak phase transition, surrounded by a region of usual vacuum? How does thermal field theory characterize this bubble? Or is it not possible? Remember the usual scenario is that during the electroweak phase of the Big Bang, all of space and vacuum has uniform plasma and temperature and this can be described by thermal field theory.. here I'm describing an isolated electroweak plasma in small section of vacuum (surrounded by normal vacuum.. see illustration above)
Furthermore.. how small can this bubble of plasma be and still create a region of thermal vacuum? For a high-momentum particle above 100 GeV.. is there a region of thermal vacuum around it?
What is your thought of this? Some references would be much appreciated. Thank you.