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What is the Higgs boson's mechanism for giving mass?
keepit said:does anyone here know what the Higgs mechanism is?
No. It's just like any other quantum field, except that there is a property of the Higgs field that is nonzero in space.keepit said:is the Higgs field equivalent to space itself?
bapowell said:No. It's just like any other quantum field, except that there is a property of the Higgs field that is nonzero in space.
That's the energy of the Higgs vacuum; I'm referring to the vacuum expectation value of the field. The latter is definitively nonzero, the former is unknown. I have no idea Veltman thinks there needs to be an energy associated with the Higgs field that would cause the universe to collapse.my2cts said:Actually the Higgs field in the vacuum should be so strong that according to Nobel laureate Veltman the universe would collapse to the size of a football.
http://lepfest.web.cern.ch/LEPFest/OfficialCeremony/Speeches/MartinusVeltman.html
bapowell said:That's the energy of the Higgs vacuum; I'm referring to the vacuum expectation value of the field. The latter is definitively nonzero, the former is unknown. I have no idea Veltman thinks there needs to be an energy associated with the Higgs field that would cause the universe to collapse.
bapowell said:That's the energy of the Higgs vacuum; I'm referring to the vacuum expectation value of the field. The latter is definitively nonzero, the former is unknown. I have no idea Veltman thinks there needs to be an energy associated with the Higgs field that would cause the universe to collapse.
keepit said:In general is the technique of renormalization required because of interactions?
I know the question is vague. That's because there's a lot i don't know.
See the figure in this post: http://dorigo.wordpress.com/2007/11/10/the-goldstone-theorem-for-real-dummies/. The values +/- [itex]\nu[/itex] are the vacuum expectation values of the field for the corresponding vacuum. The Higgs starts in the middle, at the local maximum (the false vacuum), and rolls down to one of the minima (true vacua). The energy of the true vacua, [itex]V(\pm \nu)[/itex], is the vacuum energy of the Higgs. So the vacuum expectation value of the field and the vacuum energy are different things. It is generally assumed that [itex]V(\nu)=0[/itex], but this is really just put in by hand. If [itex]V(\nu)<0[/itex], then the universe should collapse if the Higgs field is dominating the energy density of the universe (this might be what Veltmann is talking about). Otherwise, if [itex]V(\nu)>0[/itex], the universe should inflate once the Higgs field dominates.my2cts said:Can you explain the difference?
bapowell said:That's the energy of the Higgs vacuum; I'm referring to the vacuum expectation value of the field. The latter is definitively nonzero, the former is unknown. I have no idea Veltman thinks there needs to be an energy associated with the Higgs field that would cause the universe to collapse.