# Re: Weak interaction: what are these 246 GeV vacuum expectation value?

<francoisbelfort@xxxxxxxx> wrote in message news:1167863693.240380.49980@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
It is often writtem that the weak interaction has a
vacuum expectation value of 246 GeV/c^2.

Not sure where you got the /c^2 from. ??? That makes it a mass instead of energy. Got a reference where you got that from?

It is
also called the vacuum condensation energy of the Higgs
field. But what exactly is this energy?

Is it an energy density - if so: what is the underlying volume?

Is it something else?

Can anybody explain this to a novice?

The vev = 246 GeV is derived from the Fermi Coupling Constant of weak interactions. It is not an energy density.

http://en.wikipedia.org/wiki/Fermi's_interaction
G_F/(hbar*c)^3 = 1/(sqrt(2)(vev)^2)

Solve and get vev ~= 246.22 GeV

Now the wiki site has G_F dependent on g, the weak coupling constant, and the mass of the W boson, so you can say that the vev is also dependent on those. Caution: the stuff on the wiki page is in natural units of hbar = c = 1.

FrediFizzx

Quantum Vacuum Charge papers;
http://www.vacuum-physics.com/QVC/quantum_vacuum_charge.pdf
or postscript
http://www.vacuum-physics.com/QVC/quantum_vacuum_charge.ps
http://www.arxiv.org/abs/physics/0601110
http://www.vacuum-physics.com

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