Interference phenomena in the JP = 1/2− wave in η photoproduction A. V. Anisovich, E. Klempt, B. Krusche, V. A. Nikonov, A. V. Sarantsev, U. Thoma and D. Werthmüller Eur. Phys. J. A, 51 6 (2015) 72 Published online: 30 June 2015 DOI: 10.1140/epja/i2015-15072-5