Speaker
Description
Effective field theories (EFTs) are a popular theoretical method in hadron physics and few-body physics. By employing dibaryon fields (or dimer fields) for a two-nucleon system, one can expand the terms around the unitarity limit; the expanded terms are naturally matched to effective range parameters, and the dibaryon (dimer) fields are useful tools to describe bound and resonant states for a two-nucleon system. In this talk, I discuss the application of the dibaryon (or dimer) EFT to the study of nuclear reactions at low energies, for the $\alpha$-$^{12}$C system, and the $n$-$^{16}$O and $\alpha$-$^{13}C systems, where bound and resonant states of nuclei are assigned as dynamical degrees of freedom, and composite fields are employed for them. I discuss the advantages and disadvantages of the method for studying those systems in nuclear physics and nuclear astrophysics.
