2000/01/03 by J. Nieves, E. Ruiz Arriola, Nieves, J. +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.hep-ph/0001013
(RevTeX) 12 pages, 2 figures
arxiv created 2000/01/03 · openalex publication_date 2000/01/03 · arxiv updated 2009/11/30 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
Based on the recent phenomenological analysis done by M. Mojzis, Eur. Phys. Jour. \bf C2 (1998) 182, of πN scattering within the framework of Heavy Baryon Chiral Perturbation Theory we predict, after a suitable unitarization of the amplitude, the Δ resonance at √(s) = MΔ= 1238 \er2218\rm MeV and with a width of ΓΔ= 150 \er4331 \rm MeV in excellent agreement with the experimental numbers. The error bars reflect only the uncertainties in the low energy parameters as determined from an extrapolation to threshold of experimental data. We also describe satisfactorily, within errors, the phase shifts up to √(s) ∼ 1300 \rm MeV .