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Penta-Quark Anti-Decuplet in Anisotropic Lattice QCD | | N. Ishii
; T. Doi
; H. Iida
; M. Oka
; F. Okiharu
; H. Suganuma
; | | Date: |
19 Sep 2004 | | Subject: | hep-lat | | Affiliation: | Tokyo Inst. Tech.), T. Doi (RIKEN BNL), H. Iida (Tokyo Inst. Tech.), M. Oka (Tokyo Inst. Tech.), F. Okiharu (Nihon Univ.), H. Suganuma (Tokyo Inst. Tech. | | Abstract: | The penta-quark(5Q) Theta^+(1540) is studied in anisotropic lattice QCD with renormalized anisotropy a_s/a_t=4 for a high-precision measurement. Both the positive and the negative parity 5Q baryons 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 m_{Theta}simeq 2.25 GeV, which is too heavy to be identified with Theta^+(1540). In the negative parity channel, the lowest energy state is found at m_{Theta}simeq 1.75 GeV. Although it is rather close to the empirical value, it is considered to be an NK scattering state rather than a localized resonance state. | | Source: | arXiv, hep-lat/0409121 | | Services: | Forum | Review | PDF | Favorites | |
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