Let us continue our studies about the (547) meson. In previous exercise we found
that it can decay to three pions conserving parity, but for example decay to two pions
was not possible.
Experimentally the most probable decay channels for and their branching rations
are
B( !
+
) = 39%
B( ! 0 + 0 + 0) = 33%
B( ! + + ?? + 0) = 23%:
On the other hand the decay channel !
+
+
has not been observed (experi-
mentally the branching ratio is measured to be < 1:6 10??5).
(a) Figure out the C parities of the meson and of the photon.
(b) Naively one would guess that decays into the pion channel mostly trough the
strong interaction, whereas decay into the photon channel happens trough the
electromagnetic interaction, and thus the pion channel should dominate. Howe-
ver exper
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