Flavor structure of the nucleon electromagnetic form factors and transverse charge densities in the chiral quark-soliton model

초록

We investigate the flavor decomposition of the electromagnetic form factors of the nucleon, based on the chiral quark-soliton model (chi QSM) with symmetry-conserving quantization. We consider the rotational 1/N-c and linear strange-quark mass (m(s)) corrections. We discuss the results of the flavor-decomposed electromagnetic form factors in comparison with the recent experimental data. In order to see the effects of the strange quark, we compare the SU(3) results with those of SU(2). Finally, we discuss the transverse charge densities for both unpolarized and polarized nucleons. The transverse charge density inside a neutron turns out to be negative in the vicinity of the center within the SU(3) chi QSM, which can be explained by the contribution of the strange quark.

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