Massless electrons pre electroweak symmetry breaking observation

Question

I recently heard that electrons are massless at energies above electroweak symmetry breaking, has this ever been observed experimentally? I looked for it but couldn’t find anything

Answer 1

The simple answer is no. The highest energy collider we have at the moment is the Large Hadron Collider, and while it is powerful enough to investigate electroweak symmetry breaking indirectly it is not powerful enough to observe the electroweak symmetry restoration.

There is a discussion about how the symmetry restoration might be observed in the paper Electroweak Restoration at the LHC and Beyond: The Vh Channel by Li Huang, Samuel D. Lane, Ian M. Lewis and Zhen Liu. However this is rather technical and I fear it will be unintelligible to the layman.