{Delta} resonance contribution to two-photon exchange in electron-proton scattering
Journal Article
·
OSTI ID:840753
We calculate the effects on the elastic electron-proton scattering cross section of the two-photon exchange contribution with an intermediate {Delta} resonance. The {Delta} two-photon exchange contribution is found to be smaller in magnitude than the previously evaluated nucleon contribution, with an opposite sign at backward scattering angles. The sum of the nucleon and {Delta} two-photon exchange corrections has the angular dependence compatible with both the polarization transfer and the Rosenbluth methods of measuring the nucleon electromagnetic form factors.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 840753
- Report Number(s):
- JLAB-THY-05-324; DOE/ER/40150-3451; nucl-th/0506026; TRN: US0502147
- Resource Relation:
- Other Information: No journal information given for this preprint; PBD: 1 Jun 2005
- Country of Publication:
- United States
- Language:
- English
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