> On 28 May 2019, at 16:15, Lawrence Crowell <[email protected]> > wrote: > > > On Tuesday, May 28, 2019 at 6:47:41 AM UTC-5, Bruno Marchal wrote: > >> On 27 May 2019, at 14:32, Lawrence Crowell <[email protected] >> <javascript:>> wrote: >> >> On Monday, May 27, 2019 at 6:41:39 AM UTC-5, Bruno Marchal wrote: >> >>> On 24 May 2019, at 02:26, Lawrence Crowell <[email protected] <>> >>> wrote: >>> >>> On Thursday, May 23, 2019 at 11:03:49 AM UTC-5, howardmarks wrote: >>> Good point on the "Higgs" Boson. Especially when the discoverer said what >>> he said. The experiments at CERN, Fermi Lab, etc. were run with the >>> standard model in mind. They defined the "evidence" they expected a Higgs >>> boson to manifest in residue particles, and, when they found, amongst the >>> subatomic and atomic debris, a particle near the characteristics they >>> expected, they called it a "hit". There is only indirect evidence. We >>> can't directly observe picometer objects moving at close to the speed of >>> light. We know few things, like the mass to charge ratio and approx kinetic >>> energy... >>> Cheers! >>> >>> My area is physics, and have written on the connection between spacetime or >>> gravitation with particle physics. Cosmin wanted to see the Higgs boson, >>> and that is about it. It may be disappointing, but the particle only last >>> about 10^{-25} seconds on a path 10^{-15}cm long. So we detect this field >>> by the particles it decays into. Since it requires a lot of energy the >>> machine is large, the detectors are large and it is a major undertaking. I >>> don't have Higgs particles in my pocket. >> >> Really? How does your handkerchief get a mass? >> >> Bruno >> >> >> The mass of particle is due to the coupling of three of the Goldstone bosons >> in the two doublets. The Higgs particle detected does not couple to >> anything, so again I do not have a Higgs boson. >> >> The two doublets (H^+, H^-) and (H^0, h) for the charged weak currents and >> the neutral weak currents couple as >> >> W^± + H^± → WH^± >> >> Z^0 + H^0 → ZH^0 >> >> where the condensate physics of the Higgs Goldstone bosons on the left >> results in the charge and neutral currents on the left that have mass. The >> weak interaction currents on the left have transverse field components, but >> since they are massive there is no longitudinal field component. On the >> right however the weak interaction field components have longitudinal >> fields, where the degree of freedom of the Higgs Goldstone bosons are >> transferred into these longitudinal components. A lot of physics is about >> counting degrees of freedom. >> >> There are the Yukawa Lagrangians L_y ~ g_yψ-bar Hψ that give small masses to >> quarks and leptons. For low mass particles this is a few MeV, say the >> electron and ud quarks. It is tiny for neutrinos, which actually leads to >> big questions, and it approaches the mass of the Higgs particle for the top >> quark. However, most mass is in baryons due not to the Higgs condensate but >> due to the the self-confinement of the QCD interaction. >> >> So the Higgs particle measured by the LHC is this loner particle h, which in >> this theory does not couple to anything. One could imagine a theory where >> this does couple to the photon, which would break the U(1) symmetry of >> quantum electrodynamics (QED). However, in standard EW physics that does not >> happen. Curiously though, superconductivity is a case where QED is symmetry >> broken, and there have been proposals for saying this lone Higgs particle >> defines condensate states in the vacuum that are responsible for U(1) >> breaking of QED and superconductivity. Yet, if this particle is produced at >> high energy it rapidly decays into two Zs, a W++ and W^- or two photons. >> These diphoton decays, which the Zs and Ws decay into as well, are the >> target of LHC Higgs detection. > > > I was a bit joking, now <I will have to mediate all this. May naïve idea was > that the Higgs boson was needed to give mass to the particles, and so is > present everywhere there is some mass. You seem to contradict that idea, but > I will have to dig deeper n this issue. Thanks for trying, anyway. > > Bruno > > > There is a bit of an illusion that the Higgs particle gives all the mass of > the universe. It gives mass to the weak interaction currents, or the W and Z > bosons. It also gives mass to the T-quiark which has a mass slightly smaller > than the Higgs boson. It only gives a small amount of mass to stable > particles around us. Most of the mass around us come from the mass-gap > induced by the anti-screening or self-interacting properties of the QCD > bosons. This is then 98% or more the mass of a proton.
OK. And of the neutron, I guess. Then for the mass of the universe, we need to understand dark matter, also. Bruno > > LC > > > >> >> LC >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Everything List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/everything-list/6adf386e-8c8f-474e-b459-63b71de2d721%40googlegroups.com >> >> <https://groups.google.com/d/msgid/everything-list/6adf386e-8c8f-474e-b459-63b71de2d721%40googlegroups.com?utm_medium=email&utm_source=footer>. > > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/ce57c8b7-f2b0-457b-bbc3-8153d3a5f31a%40googlegroups.com > > <https://groups.google.com/d/msgid/everything-list/ce57c8b7-f2b0-457b-bbc3-8153d3a5f31a%40googlegroups.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/F52A290F-97ED-4B19-BAF2-7AF37D8874B8%40ulb.ac.be.
