2006/01/31 by Norbert Kaiser, N. Kaiser · 1 citation
Physics and Astronomy · #Chiral perturbation theory #Delta baryon #Excitation #Isobar #Isospin #Isovector #Nuclear physics #Nuclear physics research studies #Nucleon #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spin (aerodynamics) #Tensor (intrinsic definition) #Virtual particle #nucl-th
paper · pdf · doi:10.1103/physrevc.73.044001
published as Phys.Rev.C73:044001,2006 · 7 pages, 2 figures, to be published in Phys. Rev. C (2006) Brief Reports
arxiv created 2006/01/31 · openalex publication_date 2006/04/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In chiral perturbation theory, the dominant next-to-leading-order correction to the \ensuremathπ\ensuremathγ-exchange NN-potential proportional to the large isovector magnetic moment \ensuremathκv=4.7 of the nucleon is calculated. The corresponding spin-spin and tensor potentials \stackrel~VS,T(r) in coordinate space have a very simple analytical form. At long distances, r\ensuremath≃2 fm, these potentials are of similar size (but opposite in sign) as the leading-order \ensuremathπ\ensuremathγ-exchange potentials. Effects from virtual \ensuremathΔ-isobar excitation are also considered, as well as other isospin-breaking contributions to the 2\ensuremathπ-exchange NN potential induced by additional one-photon exchange.