dorsal/arxiv
View SchemaElectromagnetic form factors of the nucleon in relativistic baryon chiral perturbation theory
| Authors | Thomas Fuchs, Jambul Gegelia, Stefan Scherer |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0305070 |
| URL | https://arxiv.org/abs/nucl-th/0305070 |
| DOI | 10.1088/0954-3899/30/10/008 |
| Journal | J.Phys. G30 (2004) 1407-1426 |
Abstract
The electromagnetic form factors of the nucleon are calculated at order $q^4$ in the relativistic formulation of baryon chiral perturbation theory. In order to obtain a consistent power counting for the renormalized diagrams we make use of the extended on-mass-shell renormalization scheme which we have discussed in a recent paper. We analyze the Dirac and Pauli form factors, $F_1$ and $F_2$, as well as the electric and magnetic Sachs form factors, $G_E$ and $G_M$. Our results are compared with those obtained in the heavy-baryon approach and in the (relativistic) infrared regularization. In addition, the Sachs form factors are compared with experimental data. We confirm previous findings that a one-loop calculation of the electromagnetic form factors does not generate sufficient curvature for the Sachs form factors $G^p_E$, $G^p_M$, and $G^n_M$. Moreover, the electric form factor of the neutron is very sensitive to higher-order contributions.
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"abstract": "The electromagnetic form factors of the nucleon are calculated at order $q^4$\nin the relativistic formulation of baryon chiral perturbation theory. In order\nto obtain a consistent power counting for the renormalized diagrams we make use\nof the extended on-mass-shell renormalization scheme which we have discussed in\na recent paper. We analyze the Dirac and Pauli form factors, $F_1$ and $F_2$,\nas well as the electric and magnetic Sachs form factors, $G_E$ and $G_M$. Our\nresults are compared with those obtained in the heavy-baryon approach and in\nthe (relativistic) infrared regularization. In addition, the Sachs form factors\nare compared with experimental data. We confirm previous findings that a\none-loop calculation of the electromagnetic form factors does not generate\nsufficient curvature for the Sachs form factors $G^p_E$, $G^p_M$, and $G^n_M$.\nMoreover, the electric form factor of the neutron is very sensitive to\nhigher-order contributions.",
"arxiv_id": "nucl-th/0305070",
"authors": [
"Thomas Fuchs",
"Jambul Gegelia",
"Stefan Scherer"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex"
],
"doi": "10.1088/0954-3899/30/10/008",
"journal_ref": "J.Phys. G30 (2004) 1407-1426",
"title": "Electromagnetic form factors of the nucleon in relativistic baryon chiral perturbation theory",
"url": "https://arxiv.org/abs/nucl-th/0305070"
},
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