Abstract
The QCD sum rule for the pentaquark Θ+, first analyzed by Sugiyama, Doi and Oka, is reanalyzed with a phenomenological side that explicitly includes the contribution from the two-particle reducible kaon-nucleon intermediate state. The magnitude for the overlap of the Θ+ interpolating current with the kaon-nucleon state is obtained by using soft-kaon theorem and a separate sum rule for the ground state nucleon with the pentaquark nucleon interpolating current. It is found that the K-N intermediate state constitutes only 10% of the sum rule so that the original claim that the parity of Θ+ is negative remains valid.
Original language | English |
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Pages (from-to) | 252-258 |
Number of pages | 7 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 609 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 2005 Mar 10 |
Bibliographical note
Funding Information:This work was supported by Korea Research Foundation Grant (KRF-2004-015-C00116).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics