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| HAL : in2p3-00192845, version 1 |
| arXiv : hep-ph/0109213 |
| DOI : 10.1103/PhysRevC.65.025202 |
| Fiche détaillée |  Récupérer au format |
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| Physical Review C 65 (2002) 025202 |
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| Electromagnetic couplings of the ChPT Lagrangian from the perturbative chiral quark model |
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| V.E. LyubovitskijT. GutscheA. FaesslerR. Vinh Mau1 |
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| (2002) |
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| We apply the perturbative chiral quark model to the study of the low-energy pi-N interaction. Using an effective chiral Lagrangian we reproduce the Weinberg-Tomozawa result for the S-wave pi-N scattering lengths. After inclusion of the photon field we give predictions for the electromagnetic O(p^2) low-energy couplings of the chiral perturbation theory effective Lagrangian that define the electromagnetic mass shifts of nucleons and first-order (e^2) radiative corrections to the pi-N scattering amplitude. Finally, we estimate the leading isospin-breaking correction to the strong energy shift of the pi(-)p atom in the 1s state, which is relevant for the experiment "Pionic Hydrogen" at PSI. |
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| 1 : | LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies |
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| Thème(s) | : | Physique/Physique des Hautes Energies - Phénoménologie |
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| Chiral symmetry – Relativistic quark model – Relativistic effective Lagrangian – Pion-nucleon amplitude – Hadronic atoms |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/hep-ph/0109213 |
| in2p3-00192845, version 1 | |
| http://hal.in2p3.fr/in2p3-00192845 | |
| oai:hal.in2p3.fr:in2p3-00192845 | |
| Contributeur : Dominique Girod | |
| Soumis le : Jeudi 29 Novembre 2007, 15:13:46 | |
| Dernière modification le : Jeudi 29 Novembre 2007, 15:54:54 | |
