This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1016/j.nuclphysa.2014.06.007 in citations.
Please use the identifier: http://hdl.handle.net/2128/16418 in citations.
The electromagnetic form factors of the proton in the timelike region
The electromagnetic form factors of the proton in the timelike region
The reactions View the MathML sourcep¯p→e+e− and View the MathML sourcee+e−→p¯p are analyzed in the near-threshold region. Specific emphasis is put on the role played by the interaction in the initial or final antinucleon–nucleon (View the MathML sourceN¯N) system which is taken into account rigorou...
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Personal Name(s): | Haidenbauer, J. (Corresponding Author) |
---|---|
Kang, X.-W. / Meißner, U.-G. | |
Contributing Institute: |
Theorie der Starken Wechselwirkung; IAS-4 Theorie der starken Wechselwirkung; IKP-3 |
Published in: |
Nuclear physics |
Imprint: |
Amsterdam
North-Holland Publ. Co.
2014
|
DOI: |
10.1016/j.nuclphysa.2014.06.007 |
Document Type: |
Journal Article |
Research Program: |
TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik Hadron Structure and Dynamics (HSD) |
Link: |
Restricted OpenAccess Restricted OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/16418 in citations.
The reactions View the MathML sourcep¯p→e+e− and View the MathML sourcee+e−→p¯p are analyzed in the near-threshold region. Specific emphasis is put on the role played by the interaction in the initial or final antinucleon–nucleon (View the MathML sourceN¯N) system which is taken into account rigorously. For that purpose a recently published View the MathML sourceN¯N potential derived within chiral effective field theory and fitted to results of a new partial-wave analysis of View the MathML sourcep¯p scattering data is employed. Our results provide strong support for the conjecture that the pronounced energy dependence of the View the MathML sourcee+e−↔p¯p cross section, seen in pertinent experiments, is primarily due to the View the MathML sourcep¯p interaction. Predictions for the proton electromagnetic form factors GEGE and GMGM in the timelike region, close to the View the MathML sourceN¯N threshold, and for spin-dependent observables are presented. The steep rise of the effective form factor for energies close to the View the MathML sourcep¯p threshold is explained solely in terms of the View the MathML sourcep¯p interaction. The corresponding experimental information is quantitatively described by our calculation. |