Hadron resonances with coexistence of different natures Atsushi Hosaka, Tetsuo Hyodo, Daisuke Jido, Hideko Nagahiro, Kanabu Nawa, Shunsuke Ohkoda, Sho Ozaki, Yasuhiro Yamaguchi and Shigehiro Yasui EPJ Web of Conferences, 20 (2012) 01005 Published online: 10 February 2012 DOI: 10.1051/epjconf/20122001005