Parity of Θ+(1540) from QCD sum rules

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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 languageEnglish
Pages (from-to)252-258
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - 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


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