SU(3) classification of p wave eta pi and eta-prime pi systems

Nov, 2002

9 pages

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Abstract:

An exotic meson, the

\pi_1(1400)

with

J^{PC}=1^{-+}

, has been seen to decay into a p-wave

\eta\pi

system. If this decay conserves flavor SU(3), then it can be shown that this exotic meson must be a four-quark state (

q\bar q+q\bar q

) belonging to a flavor

{\bf10}\oplus{\bf\bar{10}}

representation of SU(3). In contrast, the

\pi_1(1600)

with a substantial decay mode into

\eta'\pi

is likely to be a member of a flavor octet.

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