Pion photo- and electroproduction with chiral MAID

Understand

We present a calculation of pion photo- and electroproduction in manifestly Lorentz-invariant baryon chiral perturbation theory up to and including order $q^4$.

• We fix the low-energy constants by fitting experimental data in all available reaction channels.
• Our results can be accessed via a web interface, the so-called chiral MAID.
• We explain how our program works and how it can be used for further analysis.