Title
| Tests of Chiral perturbation theory with COMPASS |
Author(s)
| Friedrich, Jan M (CERN) |
Collaboration
| COMPASS Collaboration |
Publication
| 2014 |
Number of pages
| 4 |
In:
| EPJ Web Conf. 73 (2014) 05011 |
In:
| 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, Rome, Italy, 30 Sep - 4 Oct 2013, pp.05011 |
DOI
| 10.1051/epjconf/20147305011
|
Subject category
| Particle Physics - Experiment |
Accelerator/Facility, Experiment
| CERN SPS ; COMPASS NA58 |
Abstract
| The COMPASS experiment at CERN accesses pion-photon reactions via the Primakoff effect., where high-energetic pions react with the quasi-real photon field surrounding the target nuclei. When a single real photon is produced, pion Compton scattering is accessed and from the measured cross-section shape, the pion polarisability is determined. The COMPASS measurement is in contradiction to the earlier dedicated measurements, and rather in agreement with the theoretical expectation from ChPT. In the same experimental data taking, reactions with neutral and charged pions in the final state are measured and analyzed in the context of chiral perturbation theory. |
Copyright/License
| CC-BY-4.0 |