QCD factorization in γ*γ → ππ and γ*N →
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M. Diehl; T. Gousset; B. Pire; O.V. Teryaev
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Article
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1999
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Elsevier Science
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English
⚖ 168 KB
Exclusive two-pion production near threshold in the collision of a highly virtuM photon with a real one offers a new possibility to unravel the partonic content of hadrons. We explain the dynamics of this regime, i.e. the separation of the amplitude in terms of partonic diagrams computable in QCD pe