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Strangeness Theory.pdf

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Summary

Particles like Σ− are long-lived despite being massive enough to decay into lighter objects, which led to the introduction of a new quantum number, strangeness (S), conserved in strong and electromagnetic interactions but violated in weak processes. The hypercharge (Y) is defined as Y = B + S, where B is the baryon charge. The presence of conserved quantities led to the proposal of an approximate SU(3) symmetry, known as the eightfold way, which classifies hadrons into multiplets. The quark model provides a natural realization of this symmetry, with quarks having specific quantum numbers. The SU(3) symmetry is broken by quark mass differences, but the electric charge and hypercharge remain conserved. The symmetry-breaking pattern can be described by the Gell-Mann-Okubo formula, which relates mass splittings in SU(3) multiplets to the quark masses.

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Particles like Σ− are long-lived despite being massive enough to decay into lighter objects, which led to the introduction of a new quantum number, strangeness...

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File Format: PDF
File Size: 91 KB
Pages: 9
Language: EN
Total Downloads: 106
Last Updated: 1 week ago

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