Report/Journal Article

PUBDB-2017-02298

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Annihilation of virtual photons into pseudoscalar mesons

Diehl, M.DESY* ; Kroll, P.Extern* ; Vogt, C.

2001
Springer Berlin

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Please use a persistent id in citations: doi:10.1007/s100520100830

Report No.: DESY-01-118; WU-B-01-03; hep-ph/0108220

Abstract: 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.

Keyword(s): electron positron: inelastic scattering ; exchange: two-photon ; photon photon: interaction ; photon: off-shell ; photon: on-shell ; pseudoscalar meson: photoproduction ; pi ; eta ; eta(958) ; form factor: transition ; quantum chromodynamics ; Feynman graph ; differential cross section: momentum transfer ; numerical calculations

Note: Theorie

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Contributing Institute(s):

1. DESY Retrocat (DESY(-2012))

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

Experiment(s):

1. No specific instrument

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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