We study the electromagnetic form factors of the lowest-lying singly heavy baryons with spin 1/2 within the framework of the chiral quark–soliton model, focusing on the comparison with recent lattice data. To compare the present results quantitatively with the lattice data, it is essential to treat the pion mass as a variable parameter, i.e., to employ unphysical values of the pion mass, which are used in lattice calculations. While the results with a physical value of the pion mass fall off faster than those from the lattice calculations as the momentum transfer increases, the extrapolated results with larger pion masses get closer to the lattice data. This indicates that the pion mean-field approach describes the structures of both light and singly heavy baryons.

中文翻译：

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单重重子电磁形式因子的介子质量依赖性

我们在手性夸克-孤子模型的框架内研究了位于最低处的自旋为 1/2 的单重重子的电磁形态因子，重点是与最近的晶格数据的比较。为了将目前的结果与晶格数据进行定量比较，必须将介子质量视为可变参数，即采用非物理的介子质量值，用于晶格计算。虽然随着动量传递的增加，具有π介子质量物理值的结果比晶格计算的结果下降得更快，但具有较大π介子质量的外推结果更接近晶格数据。这表明π介子平均场方法描述了轻重子和单个重子的结构。