Time-like compton scattering and the Bethe-Heitler process

  • Stephen R. Cotanch


Arguments are presented for p(γ,e+e)p measurements to obtain new information about the off-shell time-like nucleon form factors, especially in the φ meson region governing the φ N couplings gV,T φ N N . Theoretical predictions based upon a Quantum Hadrodynamic model and vector meson dominance are highlighted for both the proton form factor and the time-like Compton scattering cross section. The Bethe-Heitler process is also calculated but is only important at low momentum transfer |t| permitting a novel high |t| φ enhancement in the Compton cross section related to nucleon strangeness to emerge.

PACS: 12.40.Nn Regge theory – 12.40.Vv Vector-meson dominance – 13.40.Gp Electromagnetic form factors – 13.40.Hq Electromagnetic decays


Elementary Particle Form Factor Theoretical Prediction Momentum Transfer Vector Meson 
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Copyright information

© Springer-Verlag, Società Italiana di Fisica 2005

Authors and Affiliations

  • Stephen R. Cotanch
    • 1
  1. 1.Department of Physics, North Carolina State University, Raleigh NC 27695-8202USA

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