6533b7cffe1ef96bd1259a4f
RESEARCH PRODUCT
Improved unitarized Heavy Baryon Chiral Perturbation Theory for π N scattering
J.r. PeláezE. Ruiz ArriolaA. Gómez NicolaJ. Nievessubject
PhysicsNuclear and High Energy PhysicsParticle physicsFísica-Modelos matemáticosHeavy baryon chiral perturbation theoryScatteringHigh Energy Physics::LatticeNuclear TheoryHigh Energy Physics::PhenomenologyFísicaResonance (particle physics)High Energy Physics - PhenomenologyPionPiFísica matemáticaNucleonSaturation (chemistry)Nuclear ExperimentComputer Science::Databasesdescription
We show how the unitarized description of pion nucleon scattering within Heavy Baryon Chiral Perturbation Theory can be considerably improved, by a suitable reordering of the expansion over the nucleon mass. Within this framework, the $\Delta$ resonance and its associated pole can be recovered from the chiral parameters obtained from low-energy determinations. In addition, we can obtain a good description of the six $S$ and $P$ wave phase shifts in terms of chiral parameters with a natural size and compatible with the Resonance Saturation Hypothesis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-06-05 |