Cross sections for low-energy $π^-γ$ reactions

Physics – Nuclear Physics – Nuclear Theory

Scientific paper

[ 0.00 ] – not rated yet Voters 0   Comments 0

Details Cross sections for low-energy $π^-γ$ reactions Cross sections for low-energy $π^-γ$ reactions

14, pages, 10 figures, submitted to EPJA

Scientific paper

10.1140/epja/i2008-10582-9

We review the cross sections for low-energy $\pi^- \gamma$ reactions in the framework of chiral perturbation theory. Charged pion Compton scattering, $\pi^- \gamma\to \pi^-\gamma$, is considered up to one-loop order where the pion's internal structure enters through the difference of the electric and magnetic pion polarizability, $\alpha_\pi - \beta_\pi$. The ongoing COMPASS experiment aims at measuring this important structure constant with high statistics using the Primakoff effect. In the same way, the reaction $\pi^- \gamma \to \pi^- \pi^0$ serves as a test of the QCD chiral anomaly (via the $\gamma 3\pi$-coupling constant $F_{\gamma3\pi}$). Furthermore, we calculate the total cross sections for neutral and charged pion-pair production, $\pi^- \gamma \to \pi^- \pi^0\pi^0$ and $\pi^- \gamma \to \pi^-\pi^+\pi^-$, which are governed by the chiral $\pi\pi$-interaction. Finally, we investigate the radiative (correction) process $\pi^- \gamma \to \pi^- \gamma \gamma$ and calculate the corresponding two-photon mass spectrum. This information will be useful for analyzing the $\pi^-$ Primakoff scattering events with photons in the final state.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Cross sections for low-energy $π^-γ$ reactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cross sections for low-energy $π^-γ$ reactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cross sections for low-energy $π^-γ$ reactions will most certainly appreciate the feedback.

Profile ID: LFWR-SCP-O-252010

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.