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Richard Ruiz

@bravelittlemuon

Sep 3, 2019

This is incorrect. Gluons self-interact.

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André David

@DrAndreDavid

Sep 3, 2019

Thank you all for voting. In the SM, the Higgs boson is indeed the only particle that interacts with itself. The 8 gluons interact with each other not with themselves. Diagrams with “A in, A out” don’t contain self-interaction vertices, AAA. H(125) is a mystery to be cracked. twitter.com/DrAndreDavid/s…

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I agree. Why do you not,

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Gluons interact with each other. There’s eight of them and none that has given quantum numbers interacts with itself. I understand that we draw gluons and ignore the color exchanged at the vertex and that we write W and imply the two electric charges. But that’s shorthand.

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If you want to talk conserving quantum numbers, then you have a 4-point WWWW vertex, which allows W+W+ > W+W+ scattering. Again, self-coupling.

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Did you account for polarization?

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This is a bad question because polarization is a property of on-shell states. At least one Higgs propagator is never on-shell for the 3- and 4-point vertices. That said, W^+(lambda=+) + W^+(lambda=+) > W^+(lambda=+) + W^+(lambda=+) is indeed a meaningful physical process 🤠

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I'm not sure what you just said but I noticed you are a neutrino theorist. Is there any credence to the hypothesis that dark matter may be a form of neutrinos?

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hi! yes! if sterile #neutrinos exist, if their masses 🍩 are in the right ball park ⚾️, and if they live long enough, then they would constitute some fraction of #DarkMatter. however, no convincing evidence yet that sterile neutrinos even exist (though I personally like them!) 😊

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Very interesting. I'm not a quantum physicist but I do read a lot about it. Fermions have both left and right chirality so it seems to me that it could be likely that neutrinos could as well. That said, what energy levels are we talking? Would we need something bigger than LHC?

7:05 PM · Sep 3, 2019Twitter Web App

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Strictly speaking, whether or not right-handed neutrinos exist is an open question. (If nu's are their own antiparticle, then RH nu's are not needed.) Mass could be within LHC's reach but might be too weakly interacting. Folks are definitely looking: cms-results.web.cern.ch/cms-results/pu 😁😁