An introduction to the quark model
An introduction to the quark model
An introduction to the quark model
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Few-charge systems His<strong>to</strong>ry of <strong>the</strong> <strong>quark</strong> <strong>model</strong> Mesons Baryons Multi<strong>quark</strong>s and o<strong>the</strong>r exotics Outlook<br />
Permutation symmetry for (qqQ)<br />
For Ξ − = (ssd) or Σ 0 = (uds) with I = 1, this is inverted, <strong>the</strong><br />
ground state has S12 = 1, with two possibilities, J = 1/2 or<br />
J = 3/2, and <strong>the</strong> possibility of hyperfine splitting.<br />
In <strong>the</strong> early days of SU(3), <strong>the</strong> mass difference between Σ 0 and<br />
Λ was a difficulty<br />
In <strong>the</strong> explicit <strong>quark</strong> <strong>model</strong>, it is unders<strong>to</strong>od by<br />
spin 1 for (ud) in Σ 0<br />
spin 0 for (ud) in Λ<br />
JMR Quark Model