The $πNN$ and $πNN(1535)$ couplings in QCD
| dc.creator | Zhu, Shi-Lin | |
| dc.creator | Hwang, W. -Y. P. | |
| dc.creator | Dai, Yuan-Ben | |
| dc.date | 1998-09-11 | |
| dc.date.accessioned | 2026-07-07T11:11:51Z | |
| dc.date.available | 2026-07-07T11:11:51Z | |
| dc.description | The light cone QCD sum rules are derived for the $πNN$ coupling $g_{πNN}$ and $πNN(1535)$ coupling $g_{πNN^\ast}$. The contribution from the excited states and continuum is subtracted cleanly through double Borel transformation. We first improve the original sum rule for $g_{πNN}$ and determine the value of the pion wave function at the middle point $ϕ_π(u_0 ={1\over 2})=(1.5\pm 0.2)$ at $μ=1$GeV, which is a fundamental nonperturbative quantity like the quark condensate. Our calculation shows that the $πN N(1535)$ coupling is strongly suppressed. | |
| dc.description | Submitted to Phys. Rev. C | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9809033 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9809033 | |
| dc.identifier | Phys.Rev.C59:442-450,1999 | |
| dc.identifier | doi:10.1103/PhysRevC.59.442 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191232 | |
| dc.subject | Nuclear Theory | |
| dc.title | The $πNN$ and $πNN(1535)$ couplings in QCD | |
| dc.type | text |