e+e- annihilation to (pi0 pi0 gamma) and (pi0 eta gamma) as a source of information on scalar and vector mesons

Eidelman, S.; Ivashyn, S.; Korchin, A.; Pancheri, G.; Shekhovtsova, O.

doi:10.48550/arxiv.1003.2141

Cited by 2 publications

(2 citation statements)

References 32 publications

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“…A brief summary of the model is given in Appendix A. We would like to remark that a similar approach was applied in the context of other processes in [47][48][49].…”

Section: Our Approach and The Resultsmentioning

confidence: 99%

Two-photon form factors of theπ0,η, andη′mesons in the chiral theory with resonances

Czyż

Ivashyn²,

Korchin³

et al. 2012

Phys. Rev. D

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We have developed a phenomenological approach which describes very well the π 0 , η and η ′ meson production in the two-photon interactions. The simultaneous description of the π 0 , η and η ′ meson two-photon form factors is consistent with data in the space-like region. The obtained form factors are implemented in the event generator EKHARA and the simulated cross sections are presented. Uncertainties in the measured form factors coming from the model dependence in Monte Carlo simulations are studied. The model predictions for the form factor slopes at the origin are given and the high-Q 2 limit is also discussed.

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“…A brief summary of the model is given in Appendix A. We would like to remark that a similar approach was applied in the context of other processes in [47][48][49].…”

Section: Our Approach and The Resultsmentioning

confidence: 99%

Two-photon form factors of theπ0,η, andη′mesons in the chiral theory with resonances

Czyż

Ivashyn²,

Korchin³

et al. 2012

Phys. Rev. D

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“…There has been a long lasting interest in the literature for the closely related amplitudes describing the decays of the ρ, ω mesons into γππ. An illustrative list of references is [37][38][39][40][41][42][43][44][45][46][47][48][49][50]. Much of the previous work is based on computing the amplitudes from chiral Lagrangians which also include a few light resonances.…”

Section: Comparison With Some Other Approachesmentioning

confidence: 99%

Unified dispersive approach to real and virtual photon-photon scattering at low energy

Moussallam

2013

Eur. Phys. J. C

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Previous representations of pion pair production amplitudes by two real photons at low energy, which combine dispersion theoretical constraints with elastic unitarity, chiral symmetry and soft photon constraints are generalized to the case where one photon is virtual. The constructed amplitudes display explicitly the dependence on the ππ phase-shifts, on pion form factors and on pion polarizabilities. They apply both for space-like and time-like virtualities despite the apparent overlap of the left and right-hand cuts, by implementing a definition of resonance exchange amplitudes complying with analyticity and consistent limiting prescriptions for the energy variables. Applications are made to the pion generalized polarizabilies, to vector meson radiative decays, and to the σγ electromagnetic form factor. Finally, an evaluation of the contribution of γππ states in the hadronic vacuum polarization to the muon g − 2 is given, which should be less model dependent than previous estimates.

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e+e- annihilation to (pi0 pi0 gamma) and (pi0 eta gamma) as a source of information on scalar and vector mesons

Cited by 2 publications

References 32 publications

Two-photon form factors of theπ0,η, andη′mesons in the chiral theory with resonances

Two-photon form factors of theπ0,η, andη′mesons in the chiral theory with resonances

Unified dispersive approach to real and virtual photon-photon scattering at low energy

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