2003/04/30 by E. Epelbaum, Evgeny Epelbaum, W. Glöckle +3
Physics and Astronomy · #Angular momentum #Convergence (economics) #Field (mathematics) #High-Energy Particle Collisions Research #Momentum (technical analysis) #Nuclear physics research studies #Order (exchange) #Pion #Quantum Chromodynamics and Particle Interactions #Scheme (mathematics) #Work (physics) #hep-ph #nucl-th
paper · pdf · doi:10.1140/epja/i2003-10096-0
published as Eur.Phys.J.A19:125-137,2004 · 19 pp, 6 figs, enlarged version
arxiv created 2003/05/12 · openalex publication_date 2004/01/01 · arxiv updated 2014/11/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the two-pion exchange potential at next-to-next-to-leading order in chiral effective field theory. We propose a new cut-off scheme for the pion loop integrals based on spectral function regularization. We show that this method allows for a consistent implementation of constraints from pion-nucleon scattering. It leads to a much improved description of the partial waves with angular momentum l ≥ 2 as compared to the calculation utilizing dimensional regularization.