dorsal/arxiv
View Schema$\Delta$ resonance contribution to two-photon exchange in electron-proton scattering
| Authors | S. Kondratyuk, P. G. Blunden, W. Melnitchouk, J. A. Tjon |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0506026 |
| URL | https://arxiv.org/abs/nucl-th/0506026 |
| DOI | 10.1103/PhysRevLett.95.172503 |
| Journal | Phys.Rev.Lett.95:172503,2005 |
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 polarisation transfer and the Rosenbluth methods of measuring the nucleon electromagnetic form factors.
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"abstract": "We calculate the effects on the elastic electron-proton scattering cross\nsection of the two-photon exchange contribution with an intermediate $\\Delta$\nresonance. The $\\Delta$ two-photon exchange contribution is found to be smaller\nin magnitude than the previously evaluated nucleon contribution, with an\nopposite sign at backward scattering angles. The sum of the nucleon and\n$\\Delta$ two-photon exchange corrections has an angular dependence compatible\nwith both the polarisation transfer and the Rosenbluth methods of measuring the\nnucleon electromagnetic form factors.",
"arxiv_id": "nucl-th/0506026",
"authors": [
"S. Kondratyuk",
"P. G. Blunden",
"W. Melnitchouk",
"J. A. Tjon"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevLett.95.172503",
"journal_ref": "Phys.Rev.Lett.95:172503,2005",
"title": "$\\Delta$ resonance contribution to two-photon exchange in electron-proton scattering",
"url": "https://arxiv.org/abs/nucl-th/0506026"
},
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