Generalized dipole polarizabilities of the pion
| dc.creator | Scherer, S. | |
| dc.date | 1999-07-19 | |
| dc.date.accessioned | 2026-07-07T04:07:39Z | |
| dc.date.available | 2026-07-07T04:07:39Z | |
| dc.description | We discuss the virtual Compton scattering amplitude $γ^\ast+π\to γ+π$ which enters the reaction $π^-+e^-\toπ^-+e^-+γ$. The low-energy scattering amplitude is divided into a model-independent part, involving only the electromagnetic form factor, and a residual part which contains structure information related specifically to (virtual) Compton scattering. In the limit of vanishing final-photon energy, the residual amplitude can be expressed in terms of three generalized dipole polarizabilities which are functions of the squared virtual-photon four-momentum. We study the VCS amplitude in the framework of chiral perturbation theory at ${\cal O}(p^4)$. At the one-loop level the generalized dipole polarizabilities are degenerate $α_L(q^2)=α_T(q^2)=-β(q^2)$. | |
| dc.description | 11 pages, Latex2e, 5 postscript figures, uses ws-p8-50x6-00.cls, invited talk at the 2nd International Conference on Perspectives in Hadronic Physics, 10 - 14 May 1999, Trieste, Italy | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9907416 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9907416 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/49224 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.subject | Nuclear Theory | |
| dc.title | Generalized dipole polarizabilities of the pion | |
| dc.type | text |