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Title: {delta} Resonance Contribution to Two-Photon Exchange in Electron-Proton Scattering

Abstract

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 an angular dependence compatible with both the polarization-transfer and the Rosenbluth methods of measuring the nucleon electromagnetic form factors.

Authors:
; ; ;  [1]
  1. Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 (Canada)
Publication Date:
OSTI Identifier:
20699468
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 95; Journal Issue: 17; Other Information: DOI: 10.1103/PhysRevLett.95.172503; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CORRECTIONS; CROSS SECTIONS; DELTA BARYONS; ELECTROMAGNETIC FORM FACTORS; ELECTRON-PROTON INTERACTIONS; NUCLEONS; PERIPHERAL MODELS; PHOTONS; POLARIZATION; RESONANCE; SCATTERING

Citation Formats

Kondratyuk, S, Blunden, P G, Melnitchouk, W, Tjon, J A, Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, and Department of Physics, University of Maryland, College Park, Maryland 20742-4111. {delta} Resonance Contribution to Two-Photon Exchange in Electron-Proton Scattering. United States: N. p., 2005. Web. doi:10.1103/PhysRevLett.95.172503.
Kondratyuk, S, Blunden, P G, Melnitchouk, W, Tjon, J A, Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, & Department of Physics, University of Maryland, College Park, Maryland 20742-4111. {delta} Resonance Contribution to Two-Photon Exchange in Electron-Proton Scattering. United States. https://doi.org/10.1103/PhysRevLett.95.172503
Kondratyuk, S, Blunden, P G, Melnitchouk, W, Tjon, J A, Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606, and Department of Physics, University of Maryland, College Park, Maryland 20742-4111. 2005. "{delta} Resonance Contribution to Two-Photon Exchange in Electron-Proton Scattering". United States. https://doi.org/10.1103/PhysRevLett.95.172503.
@article{osti_20699468,
title = {{delta} Resonance Contribution to Two-Photon Exchange in Electron-Proton Scattering},
author = {Kondratyuk, S and Blunden, P G and Melnitchouk, W and Tjon, J A and Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 and Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 and Department of Physics, University of Maryland, College Park, Maryland 20742-4111},
abstractNote = {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 an angular dependence compatible with both the polarization-transfer and the Rosenbluth methods of measuring the nucleon electromagnetic form factors.},
doi = {10.1103/PhysRevLett.95.172503},
url = {https://www.osti.gov/biblio/20699468}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 17,
volume = 95,
place = {United States},
year = {Fri Oct 21 00:00:00 EDT 2005},
month = {Fri Oct 21 00:00:00 EDT 2005}
}