Determination of pion-baryon coupling constants from QCD sum rules
| dc.creator | Birse, Michael C. | |
| dc.creator | Krippa, Boris | |
| dc.date | 1996-06-28 | |
| dc.date | 1996-08-22 | |
| dc.date.accessioned | 2026-07-07T11:14:38Z | |
| dc.date.available | 2026-07-07T11:14:38Z | |
| dc.description | We evaluate the pi-N-N, pi-Sigma-Sigma and pi-Sigma-Lambda coupling constants using QCD sum rules based on pion-to-vacuum matrix elements of correlators of two interpolating baryon fields. The parts of the correlators with Dirac structure k-slash gamma_5 are used, keeping all terms up to dimension 5 in the OPE and including continuum contributions on the phenomenological side. The ratios of these sum rules to baryon mass sum rules yield stable results with values for the couplings of g_{pi NN}=12+/-5, g_{pi Sigma Sigma}=7+/-4 and g_{pi Sigma Lambda}=6+/-3. The sources of uncertainty are discussed. | |
| dc.description | 20 pages (RevTeX), 1 figure (attached). Revised version with corrected form for Y2 piece of hyperon correlators; numerical results differ from previous version | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9606471 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9606471 | |
| dc.identifier | Phys.Rev.C54:3240-3246,1996 | |
| dc.identifier | doi:10.1103/PhysRevC.54.3240 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/192140 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Determination of pion-baryon coupling constants from QCD sum rules | |
| dc.type | text |