dorsal/arxiv
View SchemaThe Vector Analyzing Power in Elastic Electron-Proton Scattering
| Authors | L. Diaconescu, M. J. Ramsey-Musolf |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0405044 |
| URL | https://arxiv.org/abs/nucl-th/0405044 |
| DOI | 10.1103/PhysRevC.70.054003 |
| Journal | Phys.Rev. C70 (2004) 054003 |
Abstract
We compute the vector analyzing power (VAP) for the elastic scattering of transversely polarized electrons from protons at low energies using an effective theory of electrons, protons, and photons. We study all contributions through second order in $E/M$, where $E$ and $M$ are the electron energy and nucleon mass, respectively. The leading order VAP arises from the imaginary part of the interference of one- and two-photon exchange amplitudes. Sub-leading contributions are generated by the nucleon magnetic moment and charge radius as well as recoil corrections to the leading-order amplitude. Working to ${\cal O}(E/M)^2$, we obtain a prediction for $A_n$ that is free of unknown parameters and that agrees with the recent measurement of the VAP in backward angle $ep$ scattering.
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"abstract": "We compute the vector analyzing power (VAP) for the elastic scattering of\ntransversely polarized electrons from protons at low energies using an\neffective theory of electrons, protons, and photons. We study all contributions\nthrough second order in $E/M$, where $E$ and $M$ are the electron energy and\nnucleon mass, respectively. The leading order VAP arises from the imaginary\npart of the interference of one- and two-photon exchange amplitudes.\nSub-leading contributions are generated by the nucleon magnetic moment and\ncharge radius as well as recoil corrections to the leading-order amplitude.\nWorking to ${\\cal O}(E/M)^2$, we obtain a prediction for $A_n$ that is free of\nunknown parameters and that agrees with the recent measurement of the VAP in\nbackward angle $ep$ scattering.",
"arxiv_id": "nucl-th/0405044",
"authors": [
"L. Diaconescu",
"M. J. Ramsey-Musolf"
],
"categories": [
"nucl-th",
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],
"doi": "10.1103/PhysRevC.70.054003",
"journal_ref": "Phys.Rev. C70 (2004) 054003",
"title": "The Vector Analyzing Power in Elastic Electron-Proton Scattering",
"url": "https://arxiv.org/abs/nucl-th/0405044"
},
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