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- W2560000005 abstract "The energies of the low- lying isoscalar and isovector udss configurations with spin-parity J(P) = 0(+), 1(+) and 2(+) are calculated in a non-relativistic constituent quark model by using the variational method. The contributions of various parts of the quark-quark interacting potentials including the s-channel interaction are investigated, and the effect of different forms of the confinement potential is examined. The model parameters are determined by the same method as in our previous work, and they still can satisfactorily describe the nucleon-nucleon scattering phase shifts and the hyperon-nucleon cross sections. The parameters of the s- channel interaction are fixed by the masses of K and K* mesons, for which the size parameter is taken to be two possible values. When it is chosen to be the same as baryons', the numerical results show that the masses of all the udss configurations are higher than the corresponding meson-meson thresholds. But when the size parameter for the K and K* mesons is adjusted to be smaller than that for the baryons, the udss configuration with I = 0 and J(P) = 1(+) is found to lie lower than the K* K* threshold, furthermore, this state has a very small KK* component and the interaction matrix elements between this state and KK* is comparatively small, thus its coupling to the KK* channel will consequently be weak and it might be regarded as a possible tetraquark candidate." @default.
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- W2560000005 date "2007-01-01" @default.
- W2560000005 modified "2023-09-27" @default.
- W2560000005 title "Low-lying ud(s)over-bar(s)over-bar configurations in a non-relativistic constituent quark" @default.
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