Resolution of the proton radius puzzle via off-shell form factors

2012 ◽  
Author(s):  
Gerald A. Miller ◽  
Anthony W. Thomas ◽  
Jonathan D. Carroll ◽  
Johann Rafelski
Keyword(s):  
Form Factors ◽  
Shell Form ◽  
Proton Radius ◽  
Proton Radius Puzzle

scholarly journals On the $\pi\pi$ π π continuum in the nucleon form factors and the proton radius puzzle

2016 ◽  
Vol 52 (11) ◽  
Author(s):  
M. Hoferichter ◽  
B. Kubis ◽  
J. Ruiz de Elvira ◽  
H. -W. Hammer ◽  
U. -G. Meißner
Keyword(s):  
Form Factors ◽  
Proton Radius ◽  
Nucleon Form Factors ◽  
Proton Radius Puzzle

scholarly journals Isovector electromagnetic form factors of the nucleon from lattice QCD and the proton radius puzzle

2021 ◽  
Vol 103 (9) ◽  
Author(s):  
D. Djukanovic ◽  
T. Harris ◽  
G. von Hippel ◽  
P. M. Junnarkar ◽  
H. B. Meyer ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Proton Radius ◽  
Proton Radius Puzzle

scholarly journals Connection of different parametrizations of theproton electromagnetic current operator in discrete symmetries violation case

2017 ◽  
Vol 21 (3) ◽  
pp. 140-152
Author(s):  
A.F. Krutov ◽  
P.A. Nikulin
Keyword(s):  
Discrete Symmetries ◽  
Scattering Problem ◽  
Form Factors ◽  
Structure Theory ◽  
Electromagnetic Current ◽  
Current Operator ◽  
Electromagnetic Structure ◽  
Proton Radius ◽  
Proton Radius Puzzle ◽  
Proton Form Factors

In this paper field and canonical parameterizations of matrix elements of proton electromagnetic current operator in discrete symmetries violation case were reviewed. The main principles of field and canonical operator parameteri- zations were described. The connection between proton form-factors in field and canonical parametrization has been constructed. Physical interpretation of the proton electromagnetic current odd part formfactors in canonical parametriza- tion has been obtained. Opportunity of using obtained results for solving the actual problems of proton electromagnetic structure theory - the non-rosenbluth ep-scattering problem and the proton radius puzzle - was discussed.

scholarly journals The proton radius (puzzle?) and its relatives

2021 ◽  
pp. 103901
Author(s):  
Clara Peset ◽  
Antonio Pineda ◽  
Oleksandr Tomalak
Keyword(s):  
Proton Radius ◽  
Proton Radius Puzzle

Illuminating the proton radius conundrum: the μHe+ Lamb shiftThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010.

2011 ◽  
Vol 89 (1) ◽  
pp. 47-57 ◽  
Author(s):  
A. Antognini ◽  
F. Biraben ◽  
J. M.R. Cardoso ◽  
D. S. Covita ◽  
A. Dax ◽  
...  
Keyword(s):  
Nuclear Polarization ◽  
Bound State ◽  
Atomic Systems ◽  
Charge Radii ◽  
Polarization Contribution ◽  
Proton Radius ◽  
Nuclear Rms Charge Radii ◽  
Proton Radius Puzzle ◽  
Bound State Qed

We plan to measure several 2S–2P transition frequencies in μ4He+ and μ3He+ by means of laser spectroscopy with an accuracy of 50 ppm. This will lead to a determination of the corresponding nuclear rms charge radii with a relative accuracy of 3 × 10−4, limited by the uncertainty of the nuclear polarization contribution. First, these measurements will help to solve the proton radius puzzle. Second, these very precise nuclear radii are benchmarks for ab initio few-nucleon theories and potentials. Finally when combined with an ongoing measurement of the 1S–2S transition in He+, these measurements will lead to an enhanced bound-state QED test of the 1S Lamb shift in He+.

scholarly journals Puzzling out the proton radius puzzle

2014 ◽  
Vol 81 ◽  
pp. 01009 ◽  
Author(s):  
Miha Mihovilovič ◽  
Harald Merkel ◽  
Adrian Weber
Keyword(s):  
Proton Radius ◽  
Proton Radius Puzzle

Progress on the proton-radius puzzle

Nature ◽  
2019 ◽  
Vol 575 (7781) ◽  
pp. 61-62
Author(s):  
Jean-Philippe Karr ◽  
Dominique Marchand
Keyword(s):  
Proton Radius ◽  
Proton Radius Puzzle

Solution to the proton radius puzzle

2014 ◽  
Vol 23 (12) ◽  
pp. 1450090 ◽  
Author(s):  
D. Robson
Keyword(s):  
Form Factor ◽  
Electron Scattering ◽  
Charge Radius ◽  
Rest Frame ◽  
Muonic Hydrogen ◽  
Electric Form Factor ◽  
Scattering Data ◽  
Proton Radius ◽  
Proton Charge Radius ◽  
Proton Radius Puzzle

The relationship between the static electric form factor for the proton in the rest frame and the Sachs electric form factor in the Breit momentum frame is used to provide a value for the difference in the mean squared charge radius of the proton evaluated in the two frames. Associating the muonic–hydrogen data analysis for the proton charge radius of 0.84087 fm with the rest frame and associating the electron scattering data with the Breit frame yields a prediction of 0.87944 fm for the proton radius in the relativistic frame. The most recent value deduced via electron scattering from the proton is 0.877(6) fm so that the frame dependence used here yields a plausible solution to the proton radius puzzle.

scholarly journals Two-photon frequency comb spectroscopy of atomic hydrogen

Science ◽  
2020 ◽  
Vol 370 (6520) ◽  
pp. 1061-1066 ◽  
Author(s):  
Alexey Grinin ◽  
Arthur Matveev ◽  
Dylan C. Yost ◽  
Lothar Maisenbacher ◽  
Vitaly Wirthl ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Atomic Hydrogen ◽  
Frequency Comb ◽  
Muonic Hydrogen ◽  
Significant Discrepancy ◽  
Two Photon ◽  
Proton Radius ◽  
Proton Charge ◽  
Proton Charge Radius ◽  
Proton Radius Puzzle

We have performed two-photon ultraviolet direct frequency comb spectroscopy on the 1S-3S transition in atomic hydrogen to illuminate the so-called proton radius puzzle and to demonstrate the potential of this method. The proton radius puzzle is a significant discrepancy between data obtained with muonic hydrogen and regular atomic hydrogen that could not be explained within the framework of quantum electrodynamics. By combining our result [f1S-3S = 2,922,743,278,665.79(72) kilohertz] with a previous measurement of the 1S-2S transition frequency, we obtained new values for the Rydberg constant [R∞ = 10,973,731.568226(38) per meter] and the proton charge radius [rp = 0.8482(38) femtometers]. This result favors the muonic value over the world-average data as presented by the most recent published CODATA 2014 adjustment.

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