2003/05/31 by Vladimir Pascalutsa, Daniel R. Phillips · 29 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Excitation #Nucleon #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Polarizability #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spin (aerodynamics) #Thermodynamics #nucl-th
paper · pdf · doi:10.1103/physrevc.68.055205
published in Physical Review C 68(5) (American Institute of Physics) · 14 pages, 3 figs, 4 tables; substantial revision, calculation of higher order polarizabilities included
arxiv created 2003/07/29 · openalex publication_date 2003/11/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Model-independent effects of \ensuremathΔ(1232) excitation on nucleon polarizabilities are computed in a Lorentz-invariant fashion. We find a large effect of relative order (M_\ensuremathΔ\ensuremath-M)∕M in some of the spin polarizabilities, with the backward spin polarizability receiving the largest contribution. Similar subleading effects are found to be important in the fourth-order spin-independent polarizabilities \ensuremathα_E\ensuremathν , \ensuremathαE2, \ensuremathβ_M\ensuremathν, and \ensuremathβM2. Combining our results with those for the model-independent effects of pion loops we obtain predictions for spin and fourth-order polarizabilities which compare favorably with the results of a recent dispersion-relation analysis of data.