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Open Questions about Neutrinos Today
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[QUOTE="vanhees71, post: 6435872, member: 260864"] For formulae use LaTeX. Just click the "LaTeX Guide" on the left below the input field: [URL]https://www.physicsforums.com/help/latexhelp/[/URL] It's pretty much analogous to the case of the quarks in the electroweak sector of the standard model. Also there by convention when introducing the mixing matrix (in this case the CKM=Cabibbo-Kobayashi-Maskawa matrix) you keep the up-like quarks (u,c,t) as mass-eigenstates but "mix" the down-like quarks (d,s,b). That's possible by using all the freedom to define the various physically unimportant phases of the fields. For the neutrinos the mixing matrix is named PMNS=Pontekorvo-Maki-Nakagawa-Sakati matrix. [URL]https://en.wikipedia.org/wiki/Cabibbo%E2%80%93Kobayashi%E2%80%93Maskawa_matrix[/URL] [URL]https://en.wikipedia.org/wiki/Pontecorvo%E2%80%93Maki%E2%80%93Nakagawa%E2%80%93Sakata_matrix[/URL] [/QUOTE]
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