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 />
Chromoelectric binding: unequal masses<br />
Can ano<strong>the</strong>r asymmetry overcome this problem?<br />
Yes! Remember (M + , M + , m − , m − ) becomes more stable as<br />
M/m departs from 1<br />
The same mechanism makes (QQ¯q¯q) evolving from unbound <strong>to</strong><br />
stable<br />
See Ader et al. (1982), Heller & Tjon, Brink & Stancu, Rosina &<br />
Janc, Barnea, Vijande & Valcarce, etc.<br />
The problem is <strong>the</strong> critical value of M/m required,<br />
(cc¯q¯q) bound or do we need (bb¯q¯q)<br />
Two b or not two b, that is <strong>the</strong> question!<br />
<strong>An</strong>d what about a better potential<br />
JMR Quark Model