Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 72, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-012-1917-1
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Funding
- European Community under EU [227431]
- Polish Ministry of Science and High Education [N N202 102638]
- Department of Atomic Energy, Government of India
- National Academy of Science of Ukraine [50/53-2011]
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A possibility of KLOE-2 experiment to measure the width Gamma(pi 0 -> gamma gamma) and the pi(0) 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(pi 0 -> 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) <= 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.
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