Analytic pion form factor

Lomon, Earle L.; Pacetti, Simone

doi:10.1103/physrevd.94.056002

Title: Analytic pion form factor

Journal Article · Thu Sep 08 00:00:00 EDT 2016 · Physical Review. D.

DOI:https://doi.org/10.1103/physrevd.94.056002· OSTI ID:1505783

Lomon, Earle L. ^[1]; Pacetti, Simone ^[2]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Univ. degli Studi di Perugia (Italy)

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.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0011090

OSTI ID:: 1505783

Alternate ID(s):: OSTI ID: 1322443

Journal Information:: Physical Review. D., Vol. 94, Issue 5; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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