Weak force carriers, W+, Z°, W- have spin 1
Weak force carriers, W+, Z°, W- have spin 1
Weak force carriers, W+, Z°, W- have spin 1
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Particle Data Group: cross section for e+e- annihilation at high energy<br />
6<br />
• resonance peaks for production of neutral particles – meson resonances seen<br />
at lower energy. All of these <strong>have</strong> J = 1, negative parity (recall pion has J = 0)<br />
1 1<br />
ρ = ( uu − dd) T = 1 ω = ( uu + dd ), T = 0<br />
2 2<br />
φ = ss J / ψ = cc ϒ = bb<br />
Z boson,<br />
discovered<br />
1983, CERN<br />
Total center of mass energy (GeV)
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