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Particles and Fields


Eur. Phys. J. C 22, 165-170 (2001)
DOI: 10.1007/s1005201O0785

Filter for strangeness in JPC exotic four-quark states

P.R. Page

Theoretical Division, MS B283, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

(Received: 10 May 2001 / Revised version: 15 August 2001 / Published online: 21 September 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )

Abstract
Symmetrization selection rules for the decay of four-quark states to two J=0 mesons are analysed in a non - field theoretic context with isospin symmetry. The OZI allowed decay of an isoscalar $J^{PC}=\{1,3,\ldots\}^{-+}$ exotic state to $\eta^{'}\eta$ or f0'f0 is only allowed for four-quark components of the state containing one $s\bar{s}$ pair, providing a filter for strangeness content in these states. Decays of four-quark a0 states are narrower than otherwise expected. If the experimentally observed 1-+ enhancement in $\eta\pi$ is resonant, it is qualitatively in agreement with being a four-quark state.



© Società Italiana di Fisica, Springer-Verlag 2001