Symmetries in particle physics
Symmetries in particle physics
Symmetries in particle physics
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<strong>Symmetries</strong><br />
Isosp<strong>in</strong> and G-parity<br />
Pions and isosp<strong>in</strong>: G-parity<br />
Altogether: The pion (isosp<strong>in</strong>=1) multiplet reads<br />
The unexpected m<strong>in</strong>us-sign <strong>in</strong> the neutral pion<br />
(compare with sp<strong>in</strong>) is due to the G-parity act<strong>in</strong>g<br />
on the quarks and anti-quarks (the former have<br />
positive, the latter negative G-parity).
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