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 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

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 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 Elastic electron scattering from 17Ne and 27P exotic nuclei

2019 ◽  
Vol 13 (28) ◽  
pp. 68-81
Author(s):  
A. R. Ridha
Keyword(s):  
Electron Scattering ◽  
Form Factors ◽  
Computer Code ◽  
Exotic Nuclei ◽  
Proton Density ◽  
Elastic Electron ◽  
Elastic Electron Scattering ◽  
The Difference ◽  
Proton Form Factors ◽  
Near Future

The ground state proton, neutron and matter densities andcorresponding root mean square radii of unstable proton-rich 17Neand 27P exotic nuclei are studied via the framework of the twofrequencyshell model. The single particle harmonic oscillator wavefunctions are used in this model with two different oscillator sizeparameters core b and halo , b the former for the core (inner) orbitswhereas the latter for the halo (outer) orbits. Shell model calculationsfor core nucleons and for outer (halo) nucleons in exotic nuclei areperformed individually via the computer code OXBASH. Halostructure of 17Ne and 27P nuclei is confirmed. It is found that thestructure of 17Ne and 27P nuclei have 25 / 2 (1d ) and 1/ 2 2s -dominantconfigurations, respectively. Elastic electron scattering form factorsof these exotic nuclei are also studied using the plane wave Bornapproximation. Effects of the long tail behavior of the proton densitydistribution on the proton form factors of 17Ne and 27P areanalyzed. It is found that the difference between the proton formfactor of 17Ne and that of stable 20Ne (or of 27P and that of stable31P) comes from the difference in the proton density distribution ofthe last two protons (or of the last proton) in the two nuclei. It isconcluded that elastic electron scattering will be an efficient tool (inthe near future) to examine proton-halo phenomena of proton-richnuclei.

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