2007/04/30 by V. V. Abaev, P. Metsä, M. E. Sainio · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1140/epja/i2007-10377-6
published as Eur.Phys.J.A32:321-325,2007 · 4 pages, 1 figure. v2: Revised the second last paragraph of 5th section and clarified the electromagnetic corrections (Tromborg vs. $χ$PT). Also removed the KH80 slope from the fig. 1
arxiv created 2007/05/21 · openalex publication_date 2007/05/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The Goldberger-Miyazawa-Oehme sum rule is used to extract the pion-nucleon coupling constant from experimental πN information. Chiral perturbation theory is exploited in relating the pionic hydrogen s-wave level shift and width results to the appropriate scattering lengths. The deduced value for the coupling is f2 = 0.075 ± 0.002, where the largest source of uncertainty is the determination of the s-wave π- p scattering length from the atomic level shift measurement.