https://doi.org/10.1140/epjc/s10052-012-1917-1
Regular Article - Theoretical Physics
On the possibility to measure the π 0→γγ decay width and the γ ∗ γ→π 0 transition form factor with the KLOE-2 experiment
1
INFN, Laboratori Nazionali di Frascati, Frascati, 00044, Italy
2
Institute of Physics, University of Silesia, Katowice, 40007, Poland
3
Dipartimento di Fisica, Università “Tor Vergata”, Roma, 00133, Italy
4
INFN, Sezione Roma “Tor Vergata”, Roma, 00133, Italy
5
A.I. Akhiezer Institute for Theoretical Physics, NSC “Kharkiv Institute for Physics and Technology”, Kharkiv, 61108, Ukraine
6
Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad, 211 019, India
* e-mail: s.ivashyn@gmail.com
Received:
25
October
2011
Revised:
17
January
2012
Published online:
6
March
2012
A possibility of KLOE-2 experiment to measure the width 
and the π
0
γγ
∗ 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 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≤0.1 GeV2 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.
© Springer-Verlag / Società Italiana di Fisica, 2012
