Charmed states and flavour symmetry breaking R. Horsley, Z. Koumi, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, A. Schiller, H. Stüben, R. D. Young and J. M. Zanotti EPJ Web Conf., 175 (2018) 06017 Published online: 26 March 2018 DOI: 10.1051/epjconf/201817506017