1997/08/28 by Simon Capstick, D. Robson, Capstick, Simon +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/9708054
11 pages RevTeX, including 2 figures, uses epsfig.sty
arxiv created 1997/08/28 · openalex publication_date 1997/08/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on the contributions to the nucleon weak magnetic and electric form factors arising from isospin-breaking form factors. The relativized quark model used in the calculations includes isospin impurities in the large basis nucleon wavefunctions and uses constituent quark currents with both Pauli and Dirac components. Significant contributions are found to arise from the Pauli component when it is interpreted as arising from pion-baryon loops. Including these pion cloud contributions reduces the strange magnetic form factor extracted from the recent SAMPLE measurement of the proton's weak neutral magnetic form factor at low Q2 by 35 to 52%.