Third Zemach Moment of the Proton

Details Third Zemach Moment of the Proton Third Zemach Moment of the Proton

2010-08-25

arxiv.org/abs/1008.4345v3

Phys.Rev.C83:012201,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, three figures

Scientific paper

10.1103/PhysRevC.83.012201

Modern electron scattering experiments have determined the proton electric form factor, G_{Ep}(Q^2), to high precision. We utilize this data, represented by the different form factor parametrizations, to compute the third Zemach moment of the proton charge distribution. We find that existing data rule out a value of the third Zemach moment large enough to explain the current puzzle with the proton charge radius determined from the Lamb shift in muonic hydrogen. This is in contrast with the recent claim of De Rujula [arXiv:1008.3861].

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