The experimental challenge of virtual compton scattering above 8 GeV
We discuss the experimental issues confronting measurements of the Virtual Compton Scattering (VCS) reaction ep->ep gamma with electron beam energies 6-30 GeV. We specifically address the kinematics of Deeply Virtual Compton Scattering (Deep Inelastic Scattering, with coincident detection of the exclusive real photon nearly parallel to the virtual photon direction) and large transverse momentum VCS (High energy VCS of arbitrary Q{sup 2}, and the recoil proton emitted with high momentum transverse to the virtual photon direction). We discuss the experimental equipment necessary for these measurements. For the DVCS, we emphasize the importance of the Bethe-Heitler-Compton interference terms that can be measured with the electron-positron (beam charge) asymmetry, and the electron beam helicity asymmetry.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 803326
- Report Number(s):
- JLAB-PHY-98-35; DOE/ER/40150-2292; hep-ph/9910381; TRN: US0206443
- Journal Information:
- Fizika B, Vol. 8; Other Information: invited talk at Nuclear and Particle Physics with CEBAF at Jefferson Lab, 11/3-10/98, Croatia; PBD: 1 Jul 1999
- Country of Publication:
- United States
- Language:
- English
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