Non-perturbative pion dynamics for the X(3872) V. Baru, E. Epelbaum, A. A. Filin, C. Hanhart, A. E. Kudryavtsev, Yu. S. Kalashnikova, U.-G. Meißner and A. V. Nefediev EPJ Web of Conferences, 81 (2014) 05005 Published online: 26 November 2014 DOI: 10.1051/epjconf/20148105005