Abstract
Motivated by the recent work on the calculation of the πNN coupling constant using QCD sum rule beyond the chiral limit, we construct the corresponding sum rules for the couplings, ηNN, πΞΞ, ηΞΞ, πΣΣ and ηΣΣ. In constructing the η-baryon sum rules, we use the second moment of the η wave function, which we obtain from the pion wave function after SU(3) rotation. In the SU(3) symmetric limit, we can identify the term responsible for the F/D ratio in the OPE, which after the sum rule analysis gives F/D ∼ 0.2, a factor of three smaller than from other studies. We also present a qualitative analysis including the SU(3) breaking terms.
| Original language | English |
|---|---|
| Pages (from-to) | 371-394 |
| Number of pages | 24 |
| Journal | Nuclear Physics A |
| Volume | 662 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 2000 Jan 17 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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Meson-baryon couplings and the F/D ratio from QCD sum rules. / Kim, Hungchong; Doi, Takumi; Oka, Makoto; Lee, Su Houng.
In: Nuclear Physics A, Vol. 662, No. 3-4, 17.01.2000, p. 371-394.Research output: Contribution to journal › Article
TY - JOUR
T1 - Meson-baryon couplings and the F/D ratio from QCD sum rules
AU - Kim, Hungchong
AU - Doi, Takumi
AU - Oka, Makoto
AU - Lee, Su Houng
PY - 2000/1/17
Y1 - 2000/1/17
N2 - Motivated by the recent work on the calculation of the πNN coupling constant using QCD sum rule beyond the chiral limit, we construct the corresponding sum rules for the couplings, ηNN, πΞΞ, ηΞΞ, πΣΣ and ηΣΣ. In constructing the η-baryon sum rules, we use the second moment of the η wave function, which we obtain from the pion wave function after SU(3) rotation. In the SU(3) symmetric limit, we can identify the term responsible for the F/D ratio in the OPE, which after the sum rule analysis gives F/D ∼ 0.2, a factor of three smaller than from other studies. We also present a qualitative analysis including the SU(3) breaking terms.
AB - Motivated by the recent work on the calculation of the πNN coupling constant using QCD sum rule beyond the chiral limit, we construct the corresponding sum rules for the couplings, ηNN, πΞΞ, ηΞΞ, πΣΣ and ηΣΣ. In constructing the η-baryon sum rules, we use the second moment of the η wave function, which we obtain from the pion wave function after SU(3) rotation. In the SU(3) symmetric limit, we can identify the term responsible for the F/D ratio in the OPE, which after the sum rule analysis gives F/D ∼ 0.2, a factor of three smaller than from other studies. We also present a qualitative analysis including the SU(3) breaking terms.
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U2 - 10.1016/S0375-9474(99)00426-1
DO - 10.1016/S0375-9474(99)00426-1
M3 - Article
VL - 662
SP - 371
EP - 394
JO - Nuclear Physics A
JF - Nuclear Physics A
SN - 0375-9474
IS - 3-4
ER -