Investigation of the electromagnetic structure of the η meson in the decay

Djhelyadin, R.I.; Golovkin, S.V.; Kachanov, V.A.; Константинов, А. С.; Константинов, В.Ф.; Kubarowski, V.P.; Kulik, A.V.; Landsberg, L.G.; Leontiev, V. M.; Mukhin, V.A.; Obraztsov, V.; Petrunina, T.I.; Prokoshkin, Yu.D.; Viktorov, Vladimir; Zaitzev, A.M.

doi:10.1016/0370-2693(80)90937-5

Cited by 59 publications

(11 citation statements)

References 11 publications

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“…(5) can be compared with b η ¼ 0.428ð89Þ from CELLO [32] and b η ¼ 0.501ð38Þ from CLEO [33]. The TFF was also measured in the timelike region with the results b η ¼ 0.57ð12Þ from Lepton-G [46], b η ¼ 0.585ð51Þ from NA60 [47], b η ¼ 0.58ð11Þ from A2 [48], and b η ¼ 0.68ð26Þ from WASA [49]. Recently, the A2 Collaboration reported b η ¼ 0.59ð5Þ [50], the most precise experimental extraction up to date.…”

Section: η and η 0 Transition Form Factors At Low And Intermediatmentioning

confidence: 99%

ηandη′transition form factors from rational approximants

2014

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The η and η 0 transition form factors in the spacelike region are analyzed at low and intermediate energies in a model-independent way through the use of rational approximants. The slope and curvature parameters of the form factors as well as their values at zero and infinity are extracted from experimental data. The impact of these results on the mixing parameters of the η-η 0 system and the pseudoscalar-exchange contributions to the hadronic light-by-light scattering part of the anomalous magnetic moment a μ are also discussed.

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Section: η and η 0 Transition Form Factors At Low And Intermediatmentioning

confidence: 99%

ηandη′transition form factors from rational approximants

2014

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“…Depending on the mass m M of the decaying meson, the leptons l can be either e ± or µ ± . Figure 11: Slope parameter of the timelike η transition form factor from Dalitz decays [54,55,56,57]. The gray band shows the current average value and its uncertainty listed by the PDG [4].…”

Section: Dalitz Decays Of π 0 η ηmentioning

confidence: 99%

The hadronic light-by-light contribution to the muon’s anomalous magnetic moment

Danilkin

Redmer

Vanderhaeghen

2019

Progress in Particle and Nuclear Physics

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“…An improved value of BR(η/η → γγ) or constructing a different ratio, as we do below, can allow sensitivity to these corrections. Results for the form factors F η/η γ * γ * (Q 2 ) can be broadly classified into three groups: theoretical predictions [53][54][55][56], experimental extractions [57][58][59][61][62][63], and dispersion analyses [64][65][66][67]. The standard parameterization for f (z) is a series expansion in z…”

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confidence: 99%

Scouring meson decays for true muonium

Lamm

2019

Phys. Rev. D

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Rare meson decay experiments promise to measure branching ratios as small as 10 −13 . This presents an opportunity to discover the µ + µ − bound state true muonium. We consider a set of possible channels, all with branching ratios above ∼ 10 −11 . For the electromagnetic decays η/η → (µ + µ − )γ, theoretical and phenomenological form factors F η/η γγ * (Q 2 ) allow predictions of BR(η → (µ + µ − )γ) ∼ 4.8 × 10 −10 and BR(η → (µ + µ − )γ) ∼ 3.7 × 10 −11 at the 5% level. Discussion of experimental prospects and potential backgrounds are made.

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Investigation of the electromagnetic structure of the η meson in the decay

Cited by 59 publications

References 11 publications

ηandη′transition form factors from rational approximants

ηandη′transition form factors from rational approximants

The hadronic light-by-light contribution to the muon’s anomalous magnetic moment

Scouring meson decays for true muonium

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