Analogy between meson quantum numbers and zeeman states?
From Quarks and Leptons by Halzem (pg. 49):
With reference to Table 2.2, we should add that we would not have expected L and the spin S to be good quantum numbers. However, parity conservation forbids the mixing of even and odd L states, and then C conservation requires the spin S to be unique. This leaves the possibility of mixing only for S = 1 states for which L differs by two units.
That’s interesting. Because similar situation happens in atomic physics, too. While normally Zeeman states are mixed into hyperfine levels (with good quantum numbers given by the total angular momentum F and its projections mF), under a strong magnetic field, the coupling between J and S are broken and J, S, mJ, and mS become good quantum numbers.
Is something analogous to this happening with quarks in mesons?