Mai, Maxim and Bruns, Peter C. and Meissner, Ulf-G. (2012) Pion photoproduction off the proton in a gauge-invariant chiral unitary framework. PHYSICAL REVIEW D, 86 (9): 094033. ISSN 1550-7998,
Full text not available from this repository. (Request a copy)Abstract
We investigate pion photoproduction off the proton in a manifestly gauge-invariant chiral unitary extension of chiral perturbation theory. In a first step, we consider meson-baryon scattering taking into account all next-to-leading order contact interactions. The resulting low-energy constants are determined by a fit to s-wave pion-nucleon scattering and the low-energy data for the reaction pi(-) p -> eta n To assess the theoretical uncertainty, we perform two different fit strategies. Having determined the low-energy constants, we then analyze the data on the s-wave multipole amplitudes E0+ of pion and eta photoproduction. These are parameter-free predictions, as the two new low-energy constants are determined by the neutron and proton magnetic moments.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PERTURBATION-THEORY; NUCLEON INTERACTIONS; BETHE-SALPETER; N SCATTERING; MESON; THRESHOLD; DYNAMICS; RESONANCE; ELECTROPRODUCTION; N-ASTERISK(1535); |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 May 2020 09:30 |
| Last Modified: | 04 May 2020 09:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17772 |
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