Single-spin asymmetries from two-photon exchange in elastic electron proton scattering
Conference
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OSTI ID:915335
The parity-conserving single-spin beam asymmetry of elastic electron-proton scattering is induced by an absorptive part of the two-photon exchange amplitude. We demonstrate that this asymmetry has logarithmic and double-logarithmic enhancement due to contributions of hard collinear quasi-real photons. An optical theorem is used to evaluate the asymmetry in terms of the total photoproduction cross section on the proton.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 915335
- Report Number(s):
- JLAB-THY-04-79; DOE/ER/40150-4341; TRN: US0804954
- Resource Relation:
- Conference: GDH 2004, Norfolk, Virginia, 2-5 Jun 2004.
- Country of Publication:
- United States
- Language:
- English
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