On the electromagnetic hadron current derived from the gauged Wess-Zumino-Witten action

Details On the electromagnetic hadron current derived from the gauged Wess-Zumino-Witten action On the electromagnetic hadron current derived from the gauged Wess-Zumino-Witten action

2011-08-05

arxiv.org/abs/1108.1236v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, no figure

Scientific paper

In a recent paper, based on the Skyrme model with the Wess-Zumino-Witten term including electromagnetism, Eto et al. pointed out an intriguing possibility that the Gell-Mann-Nishijima relation is corrected under the presence of back-ground electromagnetic fields, thereby being led to the conclusion that even a neutron acquires non-zero net charge in external magnetic fields. We point out that this remarkable conclusion is inseparably connected with an unwelcome feature of the gauged Wess-Zumino-Witten action, i.e. the non-conservation of source current of Maxwell equation.

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