Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen
Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen
复制标题
DOI：
10.1126/science.1230016
复制
发表时间：
2013-01-25
期刊：
影响因子：
56.9
通讯作者：
Pohl, Randolf
中科院分区：
文献类型：
--
作者：
Antognini, Aldo;Nez, Francois;Pohl, Randolf
对质子的电荷和Zemach半径的准确了解，不仅对于理解其结构，而且作为结合状态量子电动力学测试的输入及其对氢能能量水平的预测。这些半径可以从Muonic氢的激光光谱中提取（Mu P，即Muon绕质子）。我们测量了2S（1/2）（F = 0）-2p（3/2）（F = 1）MU P中的过渡频率为54611.16（1.05）Gigahertz（括号中的数字表示不确定性的标准偏差）和重新评估2S（1/2）（F = 1）-2p（3/2）（F = 2）过渡频率，产生49881.35（65）Gigahertz。从测量值中，我们确定了Zemach半径，R（Z）= 1.082（37）的ftemtometers和磁性半径，R（M）= 0.87（6）proton，proton。我们还提取了电荷半径，r（e）= 0.84087（39）符号计，其数量级比2010-codata值更精确，相对于它，相对于它，质量为7 sigma的方差，从而增强了质子半径拼图。
Accurate knowledge of the charge and Zemach radii of the proton is essential, not only for understanding its structure but also as input for tests of bound-state quantum electrodynamics and its predictions for the energy levels of hydrogen. These radii may be extracted from the laser spectroscopy of muonic hydrogen (mu p, that is, a proton orbited by a muon). We measured the 2S(1/2)(F=0)-2P(3/2)(F=1) transition frequency in mu p to be 54611.16(1.05) gigahertz (numbers in parentheses indicate one standard deviation of uncertainty) and reevaluated the 2S(1/2)(F=1)-2P(3/2)(F=2) transition frequency, yielding 49881.35(65) gigahertz. From the measurements, we determined the Zemach radius, r(Z) = 1.082(37) femtometers, and the magnetic radius, r(M) = 0.87(6) femtometer, of the proton. We also extracted the charge radius, r(E) = 0.84087(39) femtometer, with an order of magnitude more precision than the 2010-CODATA value and at 7 sigma variance with respect to it, thus reinforcing the proton radius puzzle.