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Title: Analytic pion form factor

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-q2 data, in the timelike region, requires one more meson with ρ quantum numbers than listed in the 2014 Particle Data Group review.
Authors:
 [1] ;  [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Univ. degli Studi di Perugia (Italy)
Publication Date:
Grant/Contract Number:
SC0011090
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1505783
Alternate Identifier(s):
OSTI ID: 1322443

Lomon, Earle L., and Pacetti, Simone. Analytic pion form factor. United States: N. p., Web. doi:10.1103/physrevd.94.056002.
Lomon, Earle L., & Pacetti, Simone. Analytic pion form factor. United States. doi:10.1103/physrevd.94.056002.
Lomon, Earle L., and Pacetti, Simone. 2016. "Analytic pion form factor". United States. doi:10.1103/physrevd.94.056002. https://www.osti.gov/servlets/purl/1505783.
@article{osti_1505783,
title = {Analytic pion form factor},
author = {Lomon, Earle L. and Pacetti, Simone},
abstractNote = {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-q2 data, in the timelike region, requires one more meson with ρ quantum numbers than listed in the 2014 Particle Data Group review.},
doi = {10.1103/physrevd.94.056002},
journal = {Physical Review D},
number = 5,
volume = 94,
place = {United States},
year = {2016},
month = {9}
}