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2 votes

Is the mass of the $Z$ due to mixing with the photon "precursor" $B$ or to interaction with the Higgs?

To summarise: It is correct that the photon and the $Z$ boson are linear combinations of $W^0$ and $B$. The $Z^0$ (and the $W\pm$) get their mass via the Higgs mechanism, i.e. the vacuum expactation ...
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4 votes

Can we derive the formula $Q=I_3+\frac{1}{2}(B+S)$ instead of accepting it as an empirical relation?

If you take pure QCD with massless $u$, $d$ and $s$ quarks, hadrons form multiplets of $U(3)$. This means that they can be characterized by three quantum numbers that are the eigenvalues of the three ...
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5 votes

How is it possible for $W$-boson to be so heavy when neutron and proton have similar mass?

I know that in a beta decay a neutron turns into a proton and a W-boson. The mistake is in the last words "and a W-Boson". The correct statement is "a virtual W-boson". I know ...
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2 votes
Accepted

How is it possible for $W$-boson to be so heavy when neutron and proton have similar mass?

In beta decay, a neutron, composed of two down quarks and an up quark, decays to a proton composed of a down quark and two up quarks. In the process an antineutrino and an electron are emitted. The W ...
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