%0 Journal Article
%A Diehl, M.
%A Kroll, P.
%A Vogt, C.
%T The Annihilation of virtual photons into pseudoscalar mesons
%J The European physical journal / C
%V 22
%N 3
%@ 1434-6044
%C Berlin
%I Springer
%M PUBDB-2017-02298
%M hep-ph/0108220
%M WU-B-01-03
%M DESY-01-118
%P 439 - 450
%D 2001
%Z Theorie
%X We investigate the possibility to constrain the pion distribution amplitude from the gamma* gamma* -> pi transition. For a surprisingly large range in the two photon virtualities we find that the transition form factor is essentially independent of the distribution amplitude. This in turn entails a parameter-free prediction of QCD. The gamma* gamma* -> eta, eta' form factors are also briefly discussed. We estimate that experimental studies might be feasible at the existing e+ e- experiments BaBar, Belle, and CLEO.
%K electron positron: inelastic scattering (INSPIRE)
%K exchange: two-photon (INSPIRE)
%K photon photon: interaction (INSPIRE)
%K photon: off-shell (INSPIRE)
%K photon: on-shell (INSPIRE)
%K pseudoscalar meson: photoproduction (INSPIRE)
%K pi (INSPIRE)
%K eta (INSPIRE)
%K eta(958) (INSPIRE)
%K form factor: transition (INSPIRE)
%K quantum chromodynamics (INSPIRE)
%K Feynman graph (INSPIRE)
%K differential cross section: momentum transfer (INSPIRE)
%K numerical calculations (INSPIRE)
%F PUB:(DE-HGF)29 ; PUB:(DE-HGF)16
%9 ReportJournal Article
%U <Go to ISI:>//WOS:000173172600005
%R 10.1007/s100520100830
%U https://bib-pubdb1.desy.de/record/321028