Analytic pion form factor
Name
PhysRevD.94.056002.pdf
Size
509.73 KB
Format
Adobe PDF
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Author(s)
Pacetti, Simone
Lomon, Earle L
Date Issued
September 2016
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lomon, Earle L., and Simone Pacetti. “Analytic Pion Form Factor.” Physical Review D 94.5 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
The pion electromagnetic form factor and two-pion production in electron-positron collisions are simultaneously fitted by a vector dominance model evolving to perturbative QCD at large momentum transfer. This model was previously successful in simultaneously fitting the nucleon electromagnetic form factors (spacelike region) and the electromagnetic production of nucleon-antinucleon pairs (timelike region). For this pion case dispersion relations are used to produce the analytic connection of the spacelike and timelike regions. The fit to all the data is good, especially for the newer sets of timelike data. The description of high-q[superscript 2] data, in the timelike region, requires one more meson with ρ quantum numbers than listed in the 2014 Particle Data Group review.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.94.056002
