Pion Photo- and Electroproduction and the Chiral MAID Interface
M. Hilt, B. C. Lehnhart, S. Scherer, L. Tiator
TL;DR
This paper presents a Lorentz-invariant baryon chiral perturbation theory calculation of pion photo- and electroproduction up to order $q^4$, with low-energy constants fitted to experimental data, accessible through the chiral MAID web interface.
Contribution
It introduces an extended on-mass-shell scheme for baryon chiral perturbation theory and provides a comprehensive calculation of pion production processes up to order $q^4$.
Findings
Calculated pion photo- and electroproduction cross sections up to order $q^4$.
Fitted low-energy constants to experimental data across all channels.
Provided an accessible web interface for the results.
Abstract
We discuss the extended on-mass-shell scheme for manifestly Lorentz-invariant baryon chiral perturbation theory. We present a calculation of pion photo- and electroproduction up to and including order . The low-energy constants have been fixed by fitting experimental data in all available reaction channels. Our results can be accessed via a web interface, the so-called chiral MAID (http://www.kph.uni-mainz.de/MAID/chiralmaid/).
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