Cross sections for low-energy $π^-γ$ reactions
| dc.creator | Kaiser, N. | |
| dc.creator | Friedrich, J. M. | |
| dc.date | 2008-03-06 | |
| dc.date | 2008-04-17 | |
| dc.date.accessioned | 2026-07-07T11:40:42Z | |
| dc.date.available | 2026-07-07T11:40:42Z | |
| dc.description | We review the cross sections for low-energy $π^- γ$ reactions in the framework of chiral perturbation theory. Charged pion Compton scattering, $π^- γ\to π^-γ$, is considered up to one-loop order where the pion's internal structure enters through the difference of the electric and magnetic pion polarizability, $α_π- β_π$. The ongoing COMPASS experiment aims at measuring this important structure constant with high statistics using the Primakoff effect. In the same way, the reaction $π^- γ\to π^- π^0$ serves as a test of the QCD chiral anomaly (via the $γ3π$-coupling constant $F_{\gamma3π}$). Furthermore, we calculate the total cross sections for neutral and charged pion-pair production, $π^- γ\to π^- π^0π^0$ and $π^- γ\to π^-π^+π^-$, which are governed by the chiral $ππ$-interaction. Finally, we investigate the radiative (correction) process $π^- γ\to π^- γγ$ and calculate the corresponding two-photon mass spectrum. This information will be useful for analyzing the $π^-$ Primakoff scattering events with photons in the final state. | |
| dc.description | 14, pages, 10 figures, submitted to EPJA | |
| dc.identifier | https://arxiv.org/abs/0803.0995 | |
| dc.identifier | http://arxiv.org/abs/0803.0995 | |
| dc.identifier | Eur.Phys.J.A36:181-188,2008 | |
| dc.identifier | doi:10.1140/epja/i2008-10582-9 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200331 | |
| dc.subject | Nuclear Theory | |
| dc.title | Cross sections for low-energy $π^-γ$ reactions | |
| dc.type | text |