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Timelike form factors at high energy

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      Abstract

      The difference between the timelike and spacelike meson form factors is analysed in the framework of perturbative QCD with Sudakov effects included. It is found that integrable singularities appear but that the asymptotic behavior is the same in the timelike and spacelike regions. The approach to asymptotia is quite slow and a rather constant enhancement of the timelike value is expected at measurable large \(Q^{2}\). This is in agreement with the trend shown by experimental data.

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      Journal
      15 March 1994
      hep-ph/9403293
      10.1103/PhysRevD.51.15
      Custom metadata
      Phys.Rev.D51:15-24,1995
      17 pages, report DAPNIA/SPhN 94 09
      hep-ph

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