On behalf of the « Espace de Structure et de réactions Nucléaires Théorique » (ESNT), the workshop entitled: « Recent developments and challenges for (Q)RPA-based methods » will be held on 7-9 July at CEA-Saclay, Orme-des-Merisiers site, room 45.
The theory of nuclear response plays a paramount role for our understanding of nuclear structure itself, but also for applications to particle physics and astrophysics. Multipole responses probe the basic properties of the nuclear Hamiltonian, while isovector excitations provide unique constraints on the nuclear equation of state and the symmetry energy. Moreover, understanding spin–isospin responses is essential to advance our studies of, e.g., double-beta decay and the propagation of neutrinos in the dense matter that characterises compact objects.
The Random Phase Approximation (RPA) is a microscopic approach extensively used for the study of nuclear response. Within the energy density functionals (EDF) framework, it provides a self-consistent description of small amplitude collective excitations around the ground state. When pairing correlations are included through a superfluid description of the ground state, RPA is naturally extended to the quasiparticle RPA (QRPA).
A dedicated discussion among theorists actively involved in the development of advanced RPA-type methods has become timely and necessary. Such an exchange would aim to (i) identify possible synergies between existing methods, (ii) clarify and communicate their respective complementarities and limitations, and (iii) help each other, i.e. benefit from the knowledge and expertise of colleagues to accelerate the range of applicability of the associated tools.
For details about the updated program, see the ESNT Web pages: https://esnt.cea.fr >> Ateliers 2026