Partial-wave decomposition of pion and photoproduction amplitudes A. V. Anisovich, E. Klempt, A. V. Sarantsev and U. Thoma Eur. Phys. J. A, 24 1 (2005) 111-128 Published online: 15 February 2005 DOI: 10.1140/epja/i2004-10125-6