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As you can see, the Higgs potential changes its character when Tc~150 GeV, at which point it becomes energetically favorable to be at h=0 In cosmology this behavior is known as the 'Electroweak Phase Transition', since its when all fundamental particles acquire masspic.twitter.com/JevnbJj04I
This might help clear up some confusion In the Standard Model, the masses of all fundamental particles are proportional to the value of (h) that minimizes the Higgs potential We denote this special value as〈h〉, and give it the name Vacuum Expectation Value (VEV)pic.twitter.com/HEAv8Wsl2W
Clarification (Tweet 2) should read: T~Tc, where Tc~150 GeV
It’s also worth noting: I’ve plotted the exact potential that the Standard Model predicts at large T
How do you write this beautiful math symbols in twitter?
I’ve wondered what “symmetry breaking leads to particles getting mass” meant before - thanks for this!! 
I wonder, at high T, we can still measure the yukawas as coupling constants, can we?
Why is it called expectation value? The actual expectation value of a Boltzmann distribution should be around 0 at all “temperatures”, since the potential is symmetric around 0. And can this expectation value be negative? Does that mean that there is negative mass?
What are the units of the Higgs field
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