The role of massive states in chiral perturbation theory
| dc.creator | Meißner, Ulf-G. | |
| dc.date | 1996-10-23 | |
| dc.date | 1996-10-31 | |
| dc.date.accessioned | 2026-07-07T09:03:22Z | |
| dc.date.available | 2026-07-07T09:03:22Z | |
| dc.description | I review some basic facts about the chiral limit of QCD. This allows to formulate an effective field theory below the chiral symmetry breaking scale, chiral perturbation theory (CHPT). I show that for threshold reactions, the spectrum of QCD is most economically encoded in a set of coupling constants of operators of higher chiral dimension. A consistent scheme to incorporate the $Δ(1232)$ is also discussed and some examples are given. It is stressed that more precise low--energy data are needed to further test and sharpen the resonance saturation hypothesis in the presence of baryons. | |
| dc.description | 10 pp, LaTeX, uses psfig, macro included, 1 figure, table 1 updated and corrected, some corrections in section 3, invited talk CEBAF/INT workshop on $N^*$ physics, Seattle, September 1996, to appear in the proceedings | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9610459 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9610459 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/148985 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Nuclear Theory | |
| dc.title | The role of massive states in chiral perturbation theory | |
| dc.type | text |