Anisotropic Lattice Qcd Studies of Penta - Quark Anti - Decuplet ∗
نویسنده
چکیده
Anti-decuplet penta-quark baryon is studied with the quenched anisotropic lattice QCD for accurate measurement of the correlator. Both the positive and negative parity states are studied using a non-NK type interpolating field with I = 0 and J = 1/2. After the chiral extrapolation, the lowest positive parity state is found at mΘ ≃ 2.25 GeV, which is too massive to be identified with the experimentally observed Θ(1540). The lowest negative parity state is found at mΘ ≃ 1.75 GeV, which is rather close to the empirical value. To confirm that this state is a compact 5Q resonance, a new method with “hybrid boundary condition (HBC)” is proposed. The HBC analysis shows that the observed state in the negative parity channel is an NK scattering state.
منابع مشابه
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متن کاملar X iv : h ep - l at / 0 50 10 22 v 2 2 6 Ja n 20 05 1 Penta - quark in Anisotropic Lattice QCD ∗
Penta-quark (5Q) baryons are studied using anisotropic lattice QCD for high-precision measurement of temporal correlators. A non-NK-type interpolating field is employed to study the 5Q states with J = 1/2 and I = 0. In J = 1/2 channel, the lowest-lying state is found at m5Q ≃ 2.25 GeV, which is too massive to be identified as the Θ(1540). In J = 1/2 channel, the lowest-lying state is found at m...
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