标题： 中微子散射中轴向质量异常的解决办法 显示英文标题

标题： Resolving the Axial Mass Anomaly in neutrino Scattering

摘要： 我们提出了一种参数化方法，用于描述碳束缚核子的横向电子准弹性(QE)响应函数随四动量传递平方（Q²）的观测增强，这种描述以束缚核子磁形式因子的校正为基础。 该参数化方法也应该适用于中微子散射中的横向截面。 如果横向增强起源于介子交换电流(MEC)，那么理论上可以预期纵向或轴向贡献的任何增强都很小。 我们提出了“横向增强”模型（仅基于电子散射数据）对束缚在碳中的核子的中微子和反中微子微分和总QE截面的预测。 观察到的横向增强的2Q²依赖性解决了低能和高能中微子实验在核靶上的QE总截面和微分分布之间长期存在的争议（“轴向质量异常”）。 显示英文摘要

摘要： We present a parametrization of the observed enhancement in the transverse electron quasielastic (QE) response function for nucleons bound in carbon as a function of the square of the four momentum transfer (Q2) in terms of a correction to the magnetic form factors of bound nucleons. The parametrization should also be applicable to the transverse cross section in neutrino scattering. If the transverse enhancement originates from meson exchange currents (MEC), then it is theoretically expected that any enhancement in the longitudinal or axial contributions is small. We present the predictions of the "Transverse Enhancement" model (which is based on electron scattering data only) for the neutrino and anti-neutrino differential and total QE cross sections for nucleons bound in carbon. The 2Q2 dependence of the transverse enhancement is observed to resolve much of the long standing discrepancy ("Axial Mass Anomaly}) in the QE total cross sections and differential distributions between low energy and high energy neutrino experiments on nuclear targets.