### Abstract

In the conventional QCD sum rule calculation for the πNN coupling beyond the soft-pion limit, there are three distinct Dirac structures, each of which can be used to construct separate sum rule. We point out subtleties in the previous sum rule results, based on one of the Dirac structure, associated with using either the PV or the PS coupling schemes in modeling the phenomenological side. We propose a sum rule coming from a different Dirac structure, which is independent of the coupling schemes used and has less uncertainty in the OPE. The obtained value is g_{πN} = 9.76 ± 2.04 where the uncertainty mainly comes from the quark-gluon mixed condensate.

Original language | English |
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Pages (from-to) | 199-205 |

Number of pages | 7 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 453 |

Issue number | 3-4 |

DOIs | |

Publication status | Published - 1999 May 6 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

### Cite this

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*,

*453*(3-4), 199-205. https://doi.org/10.1016/S0370-2693(99)00379-2

}

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*, vol. 453, no. 3-4, pp. 199-205. https://doi.org/10.1016/S0370-2693(99)00379-2

**QCD sum rule calculation of the πNN coupling-revisited.** / Kim, Hungchong; Lee, Su Houng; Oka, Makoto.

Research output: Contribution to journal › Article

TY - JOUR

T1 - QCD sum rule calculation of the πNN coupling-revisited

AU - Kim, Hungchong

AU - Lee, Su Houng

AU - Oka, Makoto

PY - 1999/5/6

Y1 - 1999/5/6

N2 - In the conventional QCD sum rule calculation for the πNN coupling beyond the soft-pion limit, there are three distinct Dirac structures, each of which can be used to construct separate sum rule. We point out subtleties in the previous sum rule results, based on one of the Dirac structure, associated with using either the PV or the PS coupling schemes in modeling the phenomenological side. We propose a sum rule coming from a different Dirac structure, which is independent of the coupling schemes used and has less uncertainty in the OPE. The obtained value is gπN = 9.76 ± 2.04 where the uncertainty mainly comes from the quark-gluon mixed condensate.

AB - In the conventional QCD sum rule calculation for the πNN coupling beyond the soft-pion limit, there are three distinct Dirac structures, each of which can be used to construct separate sum rule. We point out subtleties in the previous sum rule results, based on one of the Dirac structure, associated with using either the PV or the PS coupling schemes in modeling the phenomenological side. We propose a sum rule coming from a different Dirac structure, which is independent of the coupling schemes used and has less uncertainty in the OPE. The obtained value is gπN = 9.76 ± 2.04 where the uncertainty mainly comes from the quark-gluon mixed condensate.

UR - http://www.scopus.com/inward/record.url?scp=0000887367&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000887367&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(99)00379-2

DO - 10.1016/S0370-2693(99)00379-2

M3 - Article

AN - SCOPUS:0000887367

VL - 453

SP - 199

EP - 205

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 -