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 |
|---|---|
| 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 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Cite this
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Parity of Θ+(1540) from QCD sum rules. / Lee, Su Houng; Kim, Hungchong; Kwon, Youngshin.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 609, No. 3-4, 10.03.2005, p. 252-258.Research output: Contribution to journal › Article
TY - JOUR
T1 - Parity of Θ+(1540) from QCD sum rules
AU - Lee, Su Houng
AU - Kim, Hungchong
AU - Kwon, Youngshin
PY - 2005/3/10
Y1 - 2005/3/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=14144252249&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=14144252249&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2005.01.029
DO - 10.1016/j.physletb.2005.01.029
M3 - Article
VL - 609
SP - 252
EP - 258
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3-4
ER -