Two-photon decay of fully-charmed tetraquarks from light-by-light scattering at the LHC Volodymyr Biloshytskyi, Lucian Harland-Lang, Bogdan Malaescu, Vladimir Pascalutsa, Kristof Schmieden and Matthias Schott EPJ Web Conf., 274 (2022) 06007 Published online: 22 December 2022 DOI: 10.1051/epjconf/202227406007