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w4k4b4lool4
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Hi All,
I've been watching the Weinberg youtube video:
and I have two questions.
1) He says at some point that although there is a symmetry which wants the standard model particles to be massless (and which is then spontaneously broken by the Higgs mechanism), this symmetry does not imply the same for the superpartners ... it's not unnatural that these are heavier. In particular, the symmetries of the Standard Model would make the W^-+, Z^0, e^-, neutrinos, quarks, etc., massless if it weren't for the action of the Higgs. That symmetry however does not make the winos, zinos, selectrons, sneutrinos, etc., massless, so they don't need the Higgs to give them mass, they could have any mass you like, and so in particular they could have very large masses; so it's quite natural that they would be much heavier than the other particles.
Does anyone know why the superpartners don't need the action of the Higgs to give them mass??
2) There is a real mystery as to why the Higgs isn't much much heavier than the other particles. [He mentioned before that the Higgs mechanism doesn't give mass to the Higgs.] SUSY provides a possible answer: the Higgs is paired by SUSY with particles of spin 1/2 called Higgsinos, and there are mechanisms that would keep the Higgsinos light, except for the breaking of SUSY, which like the other symmetries of the SM has to be spontaneously broken. So that's another plus for SUSY.
What mechanisms could he be referring to that would keep the Higgsinos light?
Thanks in advance!
Wakabaloola
I've been watching the Weinberg youtube video:
and I have two questions.
1) He says at some point that although there is a symmetry which wants the standard model particles to be massless (and which is then spontaneously broken by the Higgs mechanism), this symmetry does not imply the same for the superpartners ... it's not unnatural that these are heavier. In particular, the symmetries of the Standard Model would make the W^-+, Z^0, e^-, neutrinos, quarks, etc., massless if it weren't for the action of the Higgs. That symmetry however does not make the winos, zinos, selectrons, sneutrinos, etc., massless, so they don't need the Higgs to give them mass, they could have any mass you like, and so in particular they could have very large masses; so it's quite natural that they would be much heavier than the other particles.
Does anyone know why the superpartners don't need the action of the Higgs to give them mass??
2) There is a real mystery as to why the Higgs isn't much much heavier than the other particles. [He mentioned before that the Higgs mechanism doesn't give mass to the Higgs.] SUSY provides a possible answer: the Higgs is paired by SUSY with particles of spin 1/2 called Higgsinos, and there are mechanisms that would keep the Higgsinos light, except for the breaking of SUSY, which like the other symmetries of the SM has to be spontaneously broken. So that's another plus for SUSY.
What mechanisms could he be referring to that would keep the Higgsinos light?
Thanks in advance!
Wakabaloola
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