Three pseudoscalar meson production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo mathvariant="bold">+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo mathvariant="bold">−</mml:mo></mml:msup></mml:math>annihilation

Dai, L.; Portolés, Jorge; Shekhovtsova, O.

doi:10.1103/physrevd.88.056001

Cited by 28 publications

(66 citation statements)

References 66 publications

(164 reference statements)

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“…In order to obtain the values of the model parameter, fits based on different sets of e + e − → π + π − π 0 and e + e − → π + π − η data were carried out. For details, see Section VII of [10]. Comparison between the theoretical prediction for the cross section of process (1) and the experimental data is presented in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction (1) was first observed at the end of 70's in the DM1 experiment [1] and since that time it was studied by Orsay [2], Novosibirsk [3][4][5][6] groups and by the BaBar collaboration [7,8]. From a theoretical point of view the ηππ production in the e + e − -annihilation and τ-lepton decay was discussed in [4,[9][10][11] using different approaches.…”

Section: Introductionmentioning

confidence: 99%

“…The left panel corresponds to the propagation via γ + ρ(770), the right one to the elaborated model used in Ref. [10]. The figures are taken from [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…4, left panel). An extended approach to study the reaction e + e − → π + π − η(π 0 ), including the excited ρ(1450) and ρ(1700) mesons as well as tiny isospin symmetry breaking effects, was proposed in [10]. In order to obtain the values of the model parameter, fits based on different sets of e + e − → π + π − π 0 and e + e − → π + π − η data were carried out.…”

Section: Introductionmentioning

confidence: 99%

“…The description of the process (1) within the framework of the Resonance Chiral Theory (RChT) is presented in [9,10]. RChT is based on the ChPT approach with the explicit inclusion of the vector and axial-vector resonances.…”

Section: Introductionmentioning

confidence: 99%

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Review of e⁺e⁻ → π⁺π⁻η

Shekhovtsova

2018

EPJ Web Conf.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The left panel corresponds to the propagation via γ + ρ(770), the right one to the elaborated model used in Ref. [10]. The figures are taken from [9,10].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Review of e⁺e⁻ → π⁺π⁻η

Shekhovtsova

2018

EPJ Web Conf.

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Two and three pseudoscalar production in e+e− annihilation and their contributions to (g − 2)μ

Qin

Dai

Portolés

2021

J. High Energ. Phys.

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A coherent study of e+e− annihilation into two (π+π−, K+K−) and three (π+π−π0, π+π−η) pseudoscalar meson production is carried out within the framework of resonance chiral theory in energy region E ≲ 2 GeV. The work of [L.Y. Dai, J. Portolés, and O. Shekhovtsova, Phys. Rev. D88 (2013) 056001] is revisited with the latest experimental data and a joint analysis of two pseudoscalar meson production. Hence, we evaluate the lowest order hadronic vacuum polarization contributions of those two and three pseudoscalar processes to the anomalous magnetic moment of the muon. We also estimate some higher-order additions led by the same hadronic vacuum polarization. Combined with the other contributions from the standard model, the theoretical prediction differs still by (21.6 ± 7.4) × 10−10 (2.9σ) from the experimental value.

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Pseudoscalar pole light-by-light contributions to the muon (g − 2) in resonance chiral theory

Guevara

Roig²,

Sanz-Cillero

2018

J. High Energ. Phys.

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We have studied the P → γ ⋆ γ ⋆ transition form-factors (P = π 0 , η, η ′ ) within a chiral invariant framework that allows us to relate the three form-factors and evaluate the corresponding contributions to the muon anomalous magnetic moment aµ = (gµ − 2)/2, through pseudoscalar pole contributions. We use a chiral invariant Lagrangian to describe the interactions between the pseudo-Goldstones from the spontaneous chiral symmetry breaking and the massive meson resonances. We will consider just the lightest vector and pseudoscalar resonance multiplets. Photon interactions and U (3) flavor breaking effects are accounted for in this covariant framework. This article studies the most general corrections of order m 2 P within this setting. Requiring short-distance constraints fixes most of the parameters entering the form-factors, consistent with previous determinations. The remaining ones are obtained from a fit of these form-factors to experimental measurements in the space-like (q 2 ≤ 0) region of photon momenta. No time-like observable is included in our fits. The combination of data, chiral symmetry relations between form-factors and high-energy constraints allows us to determine with improved precision the on-shell Ppole contribution to the Hadronic Light-by-Light scattering of the muon anomalous magnetic moment: we obtain a P,HLbL µ = (8.47 ± 0.16) · 10 −10 for our best fit. This result was obtained excluding BaBar π 0 data, which our analysis finds in conflict with the remaining experimental inputs. This study also allows us to determine the parameters describing the η − η ′ system in the two-mixing angle scheme and their correlations. Finally, a preliminary rough estimate of the impact of loop corrections (1/NC ) and higher vector multiplets (asym) enlarges the uncertainty up to a P,HLbL µ = ( 8.47 ± 0.16sta ± 0.09 1/N C +0.5 −0 asym ) · 10 −10 . Conclusions 36A Wess-Zumino-Witten Lagrangian 38 B The P form-factor in the evaluation of a HLbL µ 38 C Additional information on the fit correlations 401 The same deviation is quoted in the updated analysis of the leading hadronic vacuum polarization contribution in ref.[17], while it is 3.7σ according to the most recent study in [18]. See ref.[19] for a discussion on the Monte Carlo needs for these accurate predictions.2 Also lattice QCD simulations have recently managed to give accurate determinations. See, e.g., refs. [25].3 This dominance is not fully understood from a first-principles derivation [32,33].

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Three pseudoscalar meson production ine+e−annihilation

Cited by 28 publications

References 66 publications

Review of e⁺e⁻ → π⁺π⁻η

Review of e⁺e⁻ → π⁺π⁻η

Two and three pseudoscalar production in e+e− annihilation and their contributions to (g − 2)μ

Pseudoscalar pole light-by-light contributions to the muon (g − 2) in resonance chiral theory

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Three pseudoscalar meson production ine+e−annihilation

Cited by 28 publications

References 66 publications

Review of e+e− → π+π−η

Review of e+e− → π+π−η

Two and three pseudoscalar production in e+e− annihilation and their contributions to (g − 2)μ

Pseudoscalar pole light-by-light contributions to the muon (g − 2) in resonance chiral theory

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Product

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About

Review of e⁺e⁻ → π⁺π⁻η

Review of e⁺e⁻ → π⁺π⁻η