On the relation between low-energy constants and resonance saturation
| dc.creator | Golterman, Maarten | |
| dc.creator | Peris, Santi | |
| dc.date | 2006-07-13 | |
| dc.date.accessioned | 2026-07-07T11:27:02Z | |
| dc.date.available | 2026-07-07T11:27:02Z | |
| dc.description | Although there are phenomenological indications that the low-energy constants in the chiral lagrangian may be understood in terms of a finite number of hadronic resonances, it remains unclear how this follows from QCD. One of the arguments usually given is that low-energy constants are associated with chiral symmetry breaking, while QCD perturbation theory suggests that at high energy chiral symmetry is unbroken, so that only low-lying resonances contribute to the low-energy constants. We revisit this argument in the limit of large Nc, discussing its validity in particular for the low-energy constant L8, and conclude that QCD may be more subtle that what this argument suggests. We illustrate our considerations in a simple Regge-like model which also applies at finite Nc. | |
| dc.description | 15 pages, one figure | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0607152 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0607152 | |
| dc.identifier | Phys.Rev.D74:096002,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.096002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/196025 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Lattice | |
| dc.subject | Nuclear Theory | |
| dc.title | On the relation between low-energy constants and resonance saturation | |
| dc.type | text |