Study of the reaction e+e−→p in the total energy range 1925–2180 MeV

Delcourt, B.; Derado, I.; Bertrand, J.L.; Bisello, D.; Bizot, J.C.; Cordier, A.; Eschstruth, P.; Fayard, L.; Jeanjean, J.; Jeanjean, M.; Mané, F.; Parvan, J.C.; Ribes, M.; Rumpf, F.

doi:10.1016/0370-2693(79)90864-5

Cited by 102 publications

(61 citation statements)

References 15 publications

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“…Particularly interesting is the low mass region, reported in Fig. 1(a), together with results from previous experiments: BES [13], CLEO [14], FENICE [15], DM2 [16], DM1 [17] and ADONE73 [18].…”

Section: Measurement Of E + E − → Ppsupporting

confidence: 62%

The time-like electromagnetic form factors of proton and charged kaon at high energies

Anulli¹

2016

AIP Conference Proceedings

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Abstract. The Initial State Radiation method in the BABAR experiment has been used to measure the time-like electromagnetic form factors at the momentum transfer from 9 to 42 (GeV/c) 2 for proton and from 7 to 56 (GeV/c) 2 for charged kaon. The obtained data show the tendency to approach the QCD asymptotic prediction for kaons and space-like form factor values for proton. The BABAR data have been used together with data from other experiments, to perform a model-independent determination of the relative phases between the single-photon and the three-gluon amplitudes in ψ → KK decays. The values of the branching fractions measured in the reaction e + e − → K + K − are shifted due to interference of resonant and nonresonant amplitudes. We have determined the absolute values of the shifts to be 5% for J/ψ and 15% for ψ(2S) decays.

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Section: Measurement Of E + E − → Ppsupporting

confidence: 62%

The time-like electromagnetic form factors of proton and charged kaon at high energies

Anulli¹

2016

AIP Conference Proceedings

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“…point-like case [9] can be readily found in those publications where experiments for e + e − ↔pp were reported [11,12,52,53]. The effective form factor for the point-like case would be simply a straight line in Fig.…”

Section: Resultsmentioning

confidence: 92%

“…3 as a function of Q and compared with experiments [11,12,52,53]. We are interested in the near-threshold region and, therefore, we compare to the BaBar data with a smaller bin size listed in Table VII of their papers [11,12].…”

Section: Resultsmentioning

confidence: 99%

The electromagnetic form factors of the proton in the timelike region

2014

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The reactionspp → e + e − and e + e − →pp 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 (NN) state which is taken into account rigorously. For that purpose a recently publishedNN potential derived within chiral effective field theory and fitted to results of a new partial-wave analysis ofpp scattering data is employed. Our results provide strong support for the conjecture that the pronounced energy dependence of the e + e − ↔pp cross section, seen in pertinent experiments, is primarily due to thepp interaction. Predictions for the proton electromagnetic form factors G E and G M in the timelike region, close to theNN threshold, and for spin-dependent observables are presented. The steep rise of the effective form factor for energies close to thepp threshold is explained solely in terms of thepp interaction. The corresponding experimental information is quantitatively described by our calculation.

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“…Nine sets of data have been considered, six of them lie in the space-like region [12] and three in the time-like region [13][14][15][16][17][18][19][20][21]. The data determine the Sachs EMFF's and their ratios.…”

Section: Resultsmentioning

confidence: 99%

Timelike and spacelike electromagnetic form factors of nucleons, a unified description

Lomon

Pacetti

2012

Phys. Rev. D

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The extended Lomon-Gari-Krümpelmann model of nucleon electromagnetic form factors, which embodies ρ, ρ ′ , ω, ω ′ and φ vector meson contributions and the perturbative QCD high momentum transfer behavior has been extended to the time-like region. Breit-Wigner formulae with momentum-dependent widths have been considered for broad resonances in order to have a parametrization for the electromagnetic form factors that fulfills, in the time-like region, constraints from causality, analyticity, and unitarity.This analytic extension of the Lomon-Gari-Krümpelmann model has been used to perform a unified fit to all the nucleon electromagnetic form factor data, in the space-like and time-like region (where form factor values are extracted from e + e − ↔ N N cross sections data). The knowledge of the complete analytic structure of form factors enables predictions at extended momentum transfer, and also of time-like observables such as the ratio between electric and magnetic form factors and their relative phase.

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Study of the reaction e+e−→p in the total energy range 1925–2180 MeV

Cited by 102 publications

References 15 publications

The time-like electromagnetic form factors of proton and charged kaon at high energies

The time-like electromagnetic form factors of proton and charged kaon at high energies

The electromagnetic form factors of the proton in the timelike region

Timelike and spacelike electromagnetic form factors of nucleons, a unified description

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