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Quark Mass Dependence of Nucleon Magnetic Moment and Charge Radii |
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| Authors: | MA Wei-Xing ZHOU Li-Juan GU Yun-Ting PING Rong-Gang |
| Affiliation: | Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China;Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100039, China;Department of Information and Computing Science,Guangxi University of Technology, Liuzhou 545006, China Department of Information and Computing Science, Guangxi University of Technology, Liuzhou 545006, China;College of Physics Science and Engineering Technology, Guangxi University, Nanning 530004, China College of Physics Science and Engineering Technology, Guangxi University, Nanning 530004, China Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100039, China |
| Abstract: | Understanding hadron structure within the framework of QCD is an extremely challenging problem. Our purpose here is to explain the model-independent consequences of the approximated chiral symmetry of QCD for two famous results concerning the quark structure of the nucleon. We show that both the apparent success of the constituent quark model in reproducing the ratio of proton to neutron magnetic moments and the apparent success of the Foldy term in reproducing the observed charge radius of the neutron are coincidental. That is, a relatively small change of the current quark mass would spoil both results. |
| Keywords: | quark mass nucleon magnetic moment nucleon charge radius |
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