Pan-American Few-Body Physics Boot Camp: Fostering Collaboration

13 Oct 2025, 08:30 → 24 Oct 2025, 19:00 Europe/Rome

Aula Renzo Leonardi (ECT*)

Alinka Lepine-Szily (Physics Institute, University of Sao Paulo), Guillaume Hupin, Sebastian Konig (Department of Physics, NC State University), Tobias Frederico (Instituto Tecnologico de Aeronautica, Brazil)

The study of short-lived states, whether at the edge of nuclear stability or just above a reaction threshold, represents a complex and multifaceted domain where few-body physics emerges from the interactions of many nucleons. Recent years have seen a surge in experimental observations that continue to challenge our current models of the nucleus. As instrumentation advances rapidly, a widening gap has emerged between nuclear modeling capabilities and the data being collected. 

To address this gap and stimulate new ideas and collaborations, this workshop proposes a fresh approach by reimagining the traditional format. We aim to shift the focus toward young scientists with an interest in nuclear physics and few-body systems. By empowering these emerging researchers to cross disciplinary boundaries, share techniques, and collaborate on unresolved problems - identified by senior theorists and experimentalists or newly raised during the workshop - we hope to break the current impasse in theoretical modeling and to connect different generations working in the rich and exciting field of nuclear, hadronic and atomic few-body physics.

       

Excursion-to-Lago-di-Caldonazzo.pdf

higa-fbbc-2025.pdf

POSTER_HUPIN2025.pdf

Monday 13 October

08:30 → 09:15 workshop registration

09:15 → 10:15 Welcome address from the ECT* direction and senior staff introduction

Presentation_Hebborn.pdf

Talk-ECTstar-2025.pdf

Talk-ECTstar-small-2025.pptx

10:15 → 10:45 Coffee break

10:45 → 11:30 Fusion hindrance in the synthesis of superheavy elements

Speaker: Nils Filip Agert (IJCLab)

agert_ectstar.pdf

agert_ectstar.pptx

11:30 → 12:00 Discussion

12:00 → 13:30 Lunch

13:30 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

Tuesday 14 October

09:00 → 09:45 Talk by Andrew Smith

Speaker: Andrew John Smith (FRIB)

09:45 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 11:30 Study of the first excited state of the 4He nucleus in Halo EFT

In this talk, I will present an analysis of the first excited state of 4He within a coupled-channels formalism in Halo EFT. This state lies between two 3+1 channels and is likely associated with a four-body excited Efimov state exhibiting a 3+1 halo structure.

Speaker: Vinicius Ader (Universidade de Sao Paulo)

Presentation_ECTstar_Workshop_2025-Vinicius.pdf

11:30 → 12:00 Discussion

12:00 → 13:30 Lunch

13:30 → 14:30 Chloë lecture

Speaker: Chloë Hebborn (Facility of Rare Isotopes Beams (FRIB))

14:30 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

Wednesday 15 October

09:00 → 09:45 Complete and Incomplete Fusion of Light Nuclei

The projectile's low breakup threshold significantly impacts fusion dynamics, making precise predictions of CF and ICF cross sections a major theoretical challenge.

Speaker: Jeannie Rangel Borges (Universidade do Estado do Rio de Janeiro)

Presentation.pdf

Presentation_jeannie.pdf

09:45 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 11:30 Talk by Patrick McGlynn

Speaker: Patrick McGlynn (FRIB)

ECT__Talk_2025.pdf

11:30 → 12:00 Discussion

12:00 → 13:30 Lunch

13:30 → 14:30 Modified few-body Faddeev-type equations in configuration space

Speaker: Renat Sultanov

Trento2025.pdf

14:30 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

20:00 → 22:00 Dinner Restaurant Orso Grigio

Thursday 16 October

09:00 → 09:45 Nuclear dynamics in a time-dependent approach

Accurate modeling of nuclear dynamics is essential to understand how chemical elements are formed in stars and other extreme astrophysical environments. Such dynamical processes are naturally described by the time-dependent Schrödinger equation. In this talk, I will introduce a time-dependent coupled-cluster approach to solve it. As a first application, I will focus on how to compute nuclear response functions from the time evolution of the many-body wave function. I will show that this new method is in excellent agreement with static results for electric dipole responses in light and medium-mass nuclei. I will also discuss how the picture of giant and pygmy dipole resonances as collective oscillations of protons against neutrons emerge from evolving proton and neutron densities in time, and present results in the strong-field regime, where the system exhibits signatures of chaotic behavior.

Speaker: Francesca Bonaiti (FRIB)

PANAMWorkshop_FBonaiti.pdf

09:45 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 11:15 Discussion

12:00 → 13:00 Lunch

13:00 → 20:00 Excursion

Friday 17 October

09:00 → 09:45 Talk by Maximilian Korwieser

Speaker: Maximilian Korwieser (TUM)

ECT_PANAM_171025_FemtoSource_MKv2.pdf

09:45 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 11:30 Talk by Georgios Mantzaridis

Speaker: Georgios Mantzaridis (TUM)

deuteron_discussion_ectstar.pdf

ECTstar_workshop_2025.pdf

11:30 → 12:00 Discussion

12:00 → 13:30 Lunch

13:30 → 14:30 Tobias lecture

Speakers: Tobias Frederico (Instituto Tecnologico de Aeronautica, Brazil), Tobias Frederico (Technological Institute of Aeronautics)

14:30 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

Monday 20 October

09:00 → 09:45 Nuclear reactions and nuclear structure.

Speaker: Branda Pinheiro-Carneiro (Federal Fluminense University)

09:45 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 11:30 The Three-Body Limit Cycle: Universal Form for General Regulators

We derive the universal functional form of the three-body renormalization relation for general separable regulators through a detailed analysis of the Skorniakov-Ter-Martirosian and Faddeev equations.

Speaker: Dr Feng Wu (IJCLab)

limit_cycle_ECT_Wu.pdf

11:30 → 12:00 Discussion

12:00 → 13:30 Lunch

13:30 → 14:30 Alejandro lecture

Speaker: Alejandro Kievsky (INFN)

kievsky.pdf

14:30 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

Tuesday 21 October

09:00 → 09:45 Effective field theory for atomic 4He clusters

We study helium-4 clusters using effective field theory, computing their binding energies with quantum Monte Carlo methods. The results highlight universal features of strongly interacting systems.

Speaker: Lucas Madeira (ECT*)

madeira_panamerican.pdf

09:45 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 11:30 Deformed one-neutron halo nuclei using halo effective field theory

In this talk, I present a phenomenological extension of halo-EFT and a more formal EFT-like study that include core excitation effects. Results for Be, C and C will be shown.

Speaker: Live-Palm Kubushishi (Ohio University)

Kubushishi_Bootcamp_Trento_2025.pdf

11:30 → 12:00 Discussion

12:00 → 13:30 Lunch

13:30 → 15:00 Lecture

Speakers: Ubirajara van Kolck, Ubirajara van Kolck (IJCLab Orsay & University of Arizona), Ubirajara van Kolck (University of Arizona, IJCLab, ECT*), Ubirajara van Kolck (ECT*, Trento)

15:00 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

Wednesday 22 October

09:00 → 09:45 Correlations in relativistic heavv-ion collisions

I will discuss the basics of particle-momentum correlations in heavy-ion collisions, giving an introduction to the origins of the technique and showing its application to some simple physical systems. In doing so, we will explore the phenomenological behavior of correlation functions and touch on current challenges in the field. The topic is especially interesting as it provides insight into the interactions of very short-lived particles produced in the collision process.

Speaker: Philipp Quoss (TUD)

FemtoscopyIntroduction.pdf

09:45 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 11:30 Discrete and Continuous Scale Invariance in Quantum Few-Body Systems: Applications to Cold Atoms and Two-Neutron Halo Nuclei

Efimov universality describes three-body systems near unitarity, where large scattering lengths make their properties essentially independent of short-range interaction details. This regime is marked by discrete scale invariance, reflected in a geometric spectrum of trimers. In ultracold atomic gases, external magnetic fields allow precise tuning of interactions to the resonant regime, while confinement in traps enables the exploration of extreme spatial compression. Theoretical studies model this compression through an effective continuous dimension, showing that beyond a critical value the discrete scale invariance of three dimensions is suppressed and replaced by continuous scale invariance. Remarkably, nuclear physics offers a natural analogue: two-neutron halo nuclei are weakly bound systems sustained by a fine-tuned neutron–core interaction, leading to a very large scattering length. In this context, Efimov physics provides the framework to analyze their geometry, including the mean distances among constituents, governed by scaling laws set by a single three-body parameter.

Speaker: Rafael Mendes Francisco (ITA)

Rafael_Trento_BootCampPresentation copy.pdf

11:30 → 12:00 Discussion

12:00 → 13:30 Lunch

13:30 → 14:30 Emiko lecture

Speaker: Emiko Hiyama (Kyushu/RIKEN)

ECT-talk-hiyama.pptx

14:30 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

20:00 → 22:00 Dinner restaurant DUE MORI

Thursday 23 October

09:30 → 10:15 Clustering in light nuclei

Speaker: Louis Heitz (IJCLab)

PANAM_ECT_Heitz_small.pdf

10:15 → 10:45 Discussion

10:45 → 11:15 Coffee break

11:15 → 12:00 Talk by Luiz Tenorio

Speaker: Luiz Gustavo Mendonca Tenorio (ITA/Tohoku University)

Gaussian Expansion Method for Few-Body States in 2D.pptx

12:00 → 12:30 Discussion

12:30 → 13:30 Lunch

13:30 → 14:30 Lecture

Speaker: Renato Higa (Institute of Physics, University of Sao Paulo)

14:30 → 15:30 Group Work

15:30 → 16:00 Coffee break

16:00 → 17:00 Discussion

Friday 24 October

09:30 → 10:15 Discussion

10:15 → 10:45 Coffee break

10:45 → 12:00 Closing

12:00 → 13:30 Lunch