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

13 Oct 2025, 09:00 → 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)

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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.

       

POSTER_HUPIN2025.pdf

Monday 13 October

1 Welcome address from the ECT* direction and senior staff introduction

2 Discussion

3 Talk by Filip Agert

Speaker: Nils Filip Agert (IJCLab)

4 Discussion

5 Group Work

6 Discussion

Tuesday 14 October

7 Talk by Andrew Smith

Speaker: Andrew John Smith (FRIB)

8 Discussion

9 Talk by Vinicius Ader

Speaker: Vinicius Ader (Universidade de Sao Paulo)

10 Discussion

11 Group Work

12 Discussion

Wednesday 15 October

13 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)

14 Discussion

15 Talk by Patrick McGlynn

Speaker: Patrick McGlynn (FRIB)

16 Discussion

17 Modified few-body Faddeev-type equations in configuration space

Speaker: Renat Sultanov

18 Group Work

19 Discussion

19:00 Programme dinner

Thursday 16 October

20 Talk by Francesca Bonaiti

Speaker: Francesca Bonaiti (FRIB)

21 Discussion

22 Nuclear reactions and nuclear structure.

Speaker: Branda Pinheiro-Carneiro (Federal Fluminense University)

23 Discussion

24 Excursion

Friday 17 October

25 Talk by Maximilian Jorwieser

Speaker: Maximilian Korwieser (TUM)

26 Discussion

27 Talk by Georgios Mantzaridis

Speaker: Georgios Mantzaridis (TUM)

28 Discussion

29 Group Work

30 Discussion

Monday 20 October

31 Lecture

Speaker: Alejandro Kievsky (INFN)

32 Discussion

33 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)

34 Discussion

35 Group Work

36 Discussion

Tuesday 21 October

37 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*)

38 Discussion

39 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)

40 Discussion

41 Group Work

42 Discussion

Wednesday 22 October

43 Talk by Philipp Quoss

Speaker: Philipp Quoss (TUD)

44 Discussion

45 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)

46 Discussion

47 Lecture

48 Group Work

49 Discussion

19:00 Programme dinner

Thursday 23 October

50 Talk by Louis Heitz

Speaker: Louis Heitz (IJCLab)

51 Discussion

52 Talk by Luiz Tenorio

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

53 Discussion

54 Group Work

55 Discussion

Friday 24 October

56 Talk by Pedro Magro

Speaker: Pedro Luis Domingues Magro (Universidade de Sao Paulo)

57 Discussion

58 Group Work

59 Closing