The RMS Charge Radius of the Proton and Zemach Moments
The RMS Charge Radius of the Proton and Zemach Moments
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质子矩和 Zemach 矩的 RMS 电荷半径
DOI：
10.1016/j.physletb.2010.12.067
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发表时间：
2010
影响因子：
4.4
通讯作者：
T. Walcher
中科院分区：
文献类型：
--
作者：
M. Distler;J. Bernauer;T. Walcher
在最近对质子电形状因数的精确测量的基础上，计算了泽马赫矩，该矩需要作为输入参数，用于通过测量μ子氢的兰姆位移来确定质子均方根半径。事实证明，新矩给出的不确定性与目前 Pohl 等人最近的兰姆位移测量的误差一样大。 De Rújula 的大 Zemach 矩的想法是为了调和 μ 子兰姆位移测定与电子实验结果之间的五个标准偏差差异，这与实验明显矛盾。还涉及了其他解释。
On the basis of recent precise measurements of the electric form factor of the proton, the Zemach moments, needed as input parameters for the determination of the proton rms radius from the measurement of the Lamb shift in muonic hydrogen, are calculated. It turns out that the new moments give an uncertainty as large as the presently stated error of the recent Lamb shift measurement of Pohl et al. De Rújula's idea of a large Zemach moment in order to reconcile the five standard deviation discrepancy between the muonic Lamb shift determination and the result of electronic experiments is shown to be in clear contradiction with experiment. Alternative explanations are touched upon.