On the possibility to measure the (pi0 to gamma gamma) decay width and the (gamma* gamma to pi0) transition form factor with the KLOE-2 experiment

Abstract

A possibility of KLOE-2 experiment to measure the width Gamma(pi0 to gamma gamma) and the (pi0 gamma gamma*) form factor F(Q^2) at low invariant masses of the virtual photon in the space-like region is considered. This measurement is an important test of the strong interaction dynamics at low energies. The feasibility is estimated on the basis of a Monte-Carlo simulation. The expected accuracy for Gamma(pi0 to gamma gamma) is at a per cent level, which is better than the current experimental world average and theory. The form factor will be measured for the first time at Q^2 less or equal 0.1 GeV^2 in the space-like region. The impact of these measurements on the accuracy of the pion-exchange contribution to the hadronic light-by-light scattering part of the anomalous magnetic moment of the muon is also discussed.

2-column style; matches the revision accepted by EPJC

References in corpus (8)

• Matching perturbative and Parton Shower corrections to Bhabha process at flavour factories
• A New Measurement of the ${\pi }^0$ Radiative Decay Width
• The pseudoscalar hadronic channel contribution of the light-by-light process to the muon (g-2) within the nonlocal chiral quark model
• The hadronic light by light contribution to the $(g-2{)}_{\mu }$ with holographic models of QCD
• Determination of the Parity of the Neutral Pion via the Four-Electron Decay
• EKHARA Monte Carlo generator for e+e- to e+e-pi0 and e+e- to e+e- pi+pi- processes
• Neutral pseudoscalar meson decays: pi0, eta -> gamma gamma in SU(3) limit
• Chiral expansion of the ${\pi }^0\to \gamma \gamma$ decay width

Cited by in corpus (19)

• The anomalous magnetic moment of the muon in the Standard Model
• QCD and strongly coupled gauge theories: challenges and perspectives
• Pseudoscalar-pole contribution to the $(g_{\mu }-2)$: a rational approach
• Muon g-2 Theory: the Hadronic Part
• On the precision of a data-driven estimate of hadronic light-by-light scattering in the muon g-2: pseudoscalar-pole contribution
• γ*γ\rightarrow π^0 transition form factor at low-energies from a model-independent approach
• The VV'P form factors in resonance chiral theory and the pi-eta-eta' light-by-light contribution to the muon g-2
• ηand η' transition form factors from rational approximants
• Neutral Pion Lifetime Measurements and the QCD Chiral Anomaly
• Hadronic Contributions to the Muon Anomaly in the Constituent Chiral Quark Model
• Two-photon form factors of the pi0, eta and eta-prime mesons in the chiral theory with resonances
• Axial anomaly and vector meson dominance model
• Non-Abelian axial anomaly, axial-vector duality, and the pseudoscalar glueball
• $\eta$-$\gamma$ and ${\eta }^{\prime }$-$\gamma$ transition form factors in a nonlocal NJL model
• Analysis of the $e^{+}{e}^{-}\to {\pi }^0\gamma$ process using anomaly sum rules approach
• The KLOE-2 High Energy Tagger Detector
• Updated pseudoscalar contributions to the hadronic light-by-light of the muon (g-2)
• On the precision of a data-driven estimate of the pseudoscalar-pole contribution to hadronic light-by-light scattering in the muon g-2
• EKHARA - new gamma gamma generator