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Diffractive photo- and leptoproduction of vector mesons \(\rho\), \(\rho'\) and \(\rho''\)

  • G. Kulzinger
  • H.G. Dosch
  • H.J. Pirner
Theoretical physics

Abstract.

We calculate diffractive photo- and leptoproduction of \(\rho\)-, \(\rho'\)- and \(\rho''\)-mesons. The incoming photon dissociates into a \(q\bar{q}\)-dipole which scatters on the nucleon and transforms into a vector meson state. The scattering amplitude is calculated in non-perturbative QCD with the model of the stochastic vacuum. Assuming that the physical \(\rho'\)- and \(\rho''\)-mesons are mixed states of an active 2S-excitation and some residual hybrid state which cannot be produced diffractively in lowest order QCD, we obtain good agreement with the data, especially the markedly different spectrum in the \(\pi^+\pi^-\)-invariant mass for photoproduction and \(e^+e^-\)-annihilation.

Keywords

Lower Order Invariant Mass Vector Meson Hybrid State Meson State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • G. Kulzinger
    • 1
  • H.G. Dosch
    • 1
  • H.J. Pirner
    • 1
  1. 1. Institut für Theoretische Physik der Universität Heidelberg, Philosophenweg 16 & 19, D-69120 Heidelberg, Germany (e-mail: G.Kulzinger@thphys.uni-heidelberg.de) DE

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