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2009

Spectroscopy of light tetraquark states

Prelovsek, S., Draper, T., Lang, C. B. et al.

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We address the question whether the lightest scalar mesons sigma and kappa are tetraquarks, as is strongly supported by many phenomenological studies.

We present a search for possible light tetraquark states with J^PC=0^++ and I=0, 1/2, 3/2, 2 on the lattice.
The spectrum is determined using the generalized eigenvalue method with a number of tetraquark interpolators at the source and the sink.
In all the channels, we unavoidably find lowest scattering states pi(k)pi(-k) or K(k)pi(-k) with back-to-back momentum k=0,2*pi/L,..

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