We extend our recent analyses of the nuclear vector, axial-vector and pseudoscalar currents and derive the leading one-loop corrections to the two-nucleon scalar current operator in the framework of chiral effective field theory using the method of unitary transformation. We also show that the scalar current operators at zero momentum transfer are directly related to the quark mass dependence of the nuclear forces.

中文翻译：

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对核标量等标量电流的次导贡献

我们扩展了对核矢量，轴向矢量和伪标量电流的最新分析，并使用using变换方法在手性有效场理论的框架内得出了对两个核子标量电流算子的领先的一环修正。我们还表明，零动量传递时的标量电流算子与核力的夸克质量依赖性直接相关。