Investigating the predicted breathing-mode excitation of the Hoyle state oleh K.C.W. Li, F.D. Smit, P. Adsley, R. Neveling, P. Papka, E. Nikolskii, J.W. Brümmer, L.M. Donaldson, M. Freer, M.N. Harakeh, F. Nemulodi, L. Pellegri, V. Pesudo, M. Wiedeking, E.Z. Buthelezi, V. Chudoba, S.V. Förtsch, P. Jones, M. Kamil, J.P. Mira, G.G. O'Neill, E. Sideras-Haddad, B. Singh, S. Siem, G.F. Steyn, J.A. Swartz, I.T. Usman, J.J. van Zyl