3 papers
nucl-th2025
A renormalizable theory for not-so-light nuclei
L. Contessi, M. Schäfer, A. Gnech +2
We present an improved action for Pionless Effective Field Theory (EFT). Previous formulations of renormalizable nuclear EFTs have encountered instabilities in systems with more th…
nucl-th2024
Limits on an improved action for contact effective field theory in two-body systems
L. Contessi, M. Pavon Valderrama, U. van Kolck
We consider a possible resummation of subleading effects in two-body systems with a large scattering length as described by a short-range effective field theory (EFT). In particula…
cond-mat.quant-gas2023
Unitary interaction geometries in few-body systems
Lorenzo Contessi, Johannes Kirscher, Manuel Pavon Valderrama
We consider few-body systems in which only a certain subset of the particle-particle interactions is resonant. We characterize each subset by a {\it unitary graph} in which the ver…