Consistency between the monopole strength of the Hoyle state determined by structural calculation and that extracted from reaction observables

We analyze the α-C12 inelastic scattering to the 02+ state of C12, the Hoyle state, in a fully microscopic framework. With no free adjustable parameter, the inelastic cross sections at forward angles are well reproduced by the microscopic reaction calculation using the transition density of C12 obtained by the resonating group method and the nucleon-nucleon g matrix interaction developed by the Melbourne group. It is thus shown that the monopole transition strength obtained by the structural calculation is consistent with that extracted from the reaction observable, suggesting no missing monopole strength of the Hoyle state.