110 citations · 297 across the 14 of their papers we have counts for
14 papers
Hypernuclei with Neural Network Quantum States
Andrea Di Donna, Lorenzo Contessi, Alessandro Lovato +1
Leveraging complementary machine-learning-based approaches, we compute properties of - and -shell hypernuclei - including binding energies, single-particle densities, and…
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…
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…
Improved action for contact effective field theory
L. Contessi, M. Schäfer, U. van Kolck
We present an improved action for renormalizable effective field theories (EFTs) of systems near the two-body unitarity limit. The ordering of EFT interactions is constrained, but…
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…
Emergence of H resonance in contact theories
Lorenzo Contessi, Martin Schäfer, Johannes Kirscher +2
We obtain the - and -wave low-energy scattering parameters for nH elastic scattering and the position of the H resonance using the pionless effective field…
Emergent four-body parameter in universal two-species bosonic systems
Lorenzo Contessi, Johannes Kirscher, Manuel Pavon Valderrama
The description of unitary few-boson systems is conceptually simple: only one parameter -- the three-body binding energy -- is required to predict the binding energies of clusters…
Triple-X and beyond: hadronic systems of three and more X(3872)
Lorenzo Contessi, Johannes Kirscher, Manuel Pavon Valderrama
The resonance has been conjectured to be a charm meson-antimeson two-body molecule. Meanwhile, there is no experimental evidence for larger, few-body co…
Multi-fermion systems with contact theories
Martin Schäfer, Lorenzo Contessi, Johannes Kirscher +1
We address the question of minimal requirements for the existence of quantum bound states. In particular, we demonstrate that a few-body system with zero-range momentum-independent…
B(He) from short range effective field theory
Lorenzo Contessi, Nir Barnea, Avraham Gal
We present an effective field theory (EFT) at leading order to describe light single- hypernuclei. Owing to the weak binding and to the short interaction range, meson e…
The onset of hypernuclear binding
L. Contessi, M. Schäfer, N. Barnea +2
Binding energies of light, , hypernuclei are calculated using the stochastic variational method in a pionless effective field theory (EFT) approach at leading order w…
Resolving the hypernuclear overbinding problem in pionless effective field theory
Lorenzo Contessi, Nir Barnea, Avraham Gal
We address the -hypernuclear `overbinding problem' in light hypernuclei which stands for a 1--3 MeV excessive separation energy calculated in He. This problem arises i…
Ground-State Properties of He and O Extrapolated from Lattice QCD with Pionless EFT
L. Contessi, A. Lovato, F. Pederiva +3
We extend the prediction range of Pionless Effective Field Theory with an analysis of the ground state of O in leading order. To renormalize the theory, we use as input both…
Effective Field Theory for Lattice Nuclei
N. Barnea, L. Contessi, D. Gazit +2
We show how nuclear effective field theory (EFT) and ab initio nuclear-structure methods can turn input from lattice quantum chromodynamics (LQCD) into predictions for the properti…