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标题：Electromagnetic form factors of the Delta baryon
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作者：C. Alexandrou ; T. Korzec ; T. Leontiou 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We develop a methodology that enables us to extract accurately the electromagnetic D form factors and their momentum dependence. We test our approach in the quenched approximation as a preparation for a study using dynamical fermions. Our calculation of the four form factors covers pion masses between about 410 MeV and 560 MeV on lattices with a size of 2.9 fm and a lattice spacing 0.09 fm. From the form factors we are able to obtain estimates of the magnetic moment and the charge radius of the D, which we compare to existing experimental and theoretical results. Our non-zero result for the electric quadrupole form factor signals a deformation of the D, pointing to an oblate charge distribution.