This title appears in the Scientific Report :
2004
Please use the identifier:
http://dx.doi.org/10.1140/epja/i2003-10223-y in citations.
Please use the identifier: http://hdl.handle.net/2128/10685 in citations.
Updated dispersion-theoretical analysis of the nucleon electromagnetic form factor
Updated dispersion-theoretical analysis of the nucleon electromagnetic form factor
In the light of the new data on the various neutron and proton electromagnetic form factors taken in recent years, we update the dispersion-theoretical analysis of the nucleon electromagnetic form factors from the mid-nineties. The parametrization of the spectral functions includes constraints from...
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Personal Name(s): | Hammer, H.-W. |
---|---|
Meissner, U.G. | |
Contributing Institute: |
Institut 3 (Theoretische Kernphysik); IKP-TH |
Published in: | The @European physical journal / A, 20 (2004) S. 469 - 473 |
Imprint: |
Berlin
Springer
2004
|
Physical Description: |
469 - 473 |
DOI: |
10.1140/epja/i2003-10223-y |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen |
Series Title: |
European Physical Journal A
20 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10685 in citations.
In the light of the new data on the various neutron and proton electromagnetic form factors taken in recent years, we update the dispersion-theoretical analysis of the nucleon electromagnetic form factors from the mid-nineties. The parametrization of the spectral functions includes constraints from unitarity, perturbative QCD, and recent measurements of the neutron charge radius. We obtain a good description of most modern form factor data. with the exception of the Jefferson Lab data on G(E)(p)/G(M)(p) in the four-momentum transfer range Q(2) = 3... 6 GeV2. For the magnetic radii of the proton and the neutron we find r(M)(p) =0.857 fm and r(M)(n) = 0.879 fm, which is consistent with the recent determinations using continued-fraction expansions. |