Comparison of results for the electromagnetic form factors of the proton\n at low Q²

2020/09/09 by E. Matsinos, Matsinos, Evangelos
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Atomic and Molecular Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Scientific Research and Discoveries

paper · pdf · doi:10.48550/arxiv.2009.04156

openalex publication_date 2020/09/09 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28

Abstract

The goal in this work is the comparison of five parameterisations of the\nSachs form factors of the proton G^p_E (electric) and G^p_M (magnetic) at\nlow 4-momentum transfer Q². It will be shown that a simple model, based on\ntwo dipoles which admit as parameters the rms electric charge radius r_E;p\nand the rms magnetic radius r_M;p of the proton, suffices for the purposes\nof the phase-shift analyses (PSAs) of the low-energy pion-nucleon (\π N)\ndata. The replacement of the electromagnetic form factors, currently used in\nthe ETH model of the \π N interaction, by the parameterisation of this work\nwill enable the removal from the PSAs of this research programme of the largest\npart of the dependence on extraneous sources.\n

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