ETHNP (Effective Theories in Hadron and Nuclear Physics)

Lista de Contribuciones

3. Welcome and introduction

3/9/26 13:45

Thursday afternoon (Session 1)

13. Predicting $B^{(*)}\bar D{}^{(*)}$ states from a reanalysis of lattice QCD data

Pan-Pan Shi (IFIC)

3/9/26 14:00

Thursday afternoon (Session 1)

We reanalyze the lattice QCD data for the isoscalar $J^P=0^+$ and $1^+$ $\bar b \bar c u d$ systems at $m_{\pi}\simeq 220$ MeV by incorporating both short- and long-range interactions. Using the interaction constrained by the lattice results, we predict a spectrum of isoscalar $B^{(*)}\bar D{}^{(*)}$ molecular states with quantum numbers $J^{P}=0^+$, $1^+$, and $2^+$. The predicted $J^P=0^+$...

6. Hyperon non-leptonic decays in relativistic ChPT with resonances

Fernando Alvarado (RUB)

3/9/26 17:00

Thursday afternoon (Session 1)

The non-leptonic decays of hyperons constitute a longstanding theoretical problem. Motivated by recent measurements from the BESIII collaboration, we study these processes in Chiral Perturbation Theory in new Ref. [2604.00646]. We perform the first relativistic calculation of such decays and include the decuplet as an explicit degree of freedom. Moreover, the contributions from the $1/2^−$ and...

7. Revealing the puzzle of the dynamical nature of two 𝑫_𝟎^∗ states from an analysis of LQCD results

Zejian Zhuang (University of Valencia)

3/9/26 17:30

Thursday afternoon (Session 1)

We perform an analysis of LQCD light - charmed (pseudoscalar) meson scattering data with UChPT for pion masses ranging from $m_\pi\simeq 230$~MeV till the SU(3) limit, $m_\pi\simeq 700$~MeV. We find two poles in the non-strange isospin $I=1/2$ sector that can be related to the experimental $D_0(2300)$ resonance. At the physical pion mass, the poles are located at...

4. Correlation Functions for Coupled $K \Lambda$ Interaction and $N(1535)$ Resonance

Prof. Ju-Jun Xie (Institute of Modern Physics, Chinese Academy of Sciences)

4/9/26 9:30

Friday morning (Session 2)

The $K \Lambda$ interactions in coupled channels are investigate around the energy region of $N(1535)$ resonance through femtoscopic correlation functions within the Koonin-Pratt formalism, by means of which the $N(1535)$ resonance can be dynamically generated in the chiral unitary approach. Two-body scattering amplitudes are calculated using the chiral unitary approach, and the corresponding...

14. Femtoscopy as a new venue for nuclear physics: alpha-alpha scattering

Amador Garcia Lorenzo (IFIC)

4/9/26 11:00

Friday morning (Session 2)

We present the first fully theoretical description of the $\alpha$$\alpha$ femtoscopic correlation function, establishing two-particle correlations as a complementary probe of low-energy $\alpha$$\alpha$ dynamics. Our framework incorporates Coulomb-distorted scattering states, Bose symmetrization, decay feed-down, higher partial waves, finite-range corrections, experimental momentum...

12. Correlation function for the $n \bar{D}_{s0}^*(2317)$ interaction and the issue of elastic unitarity

Natsumi Ikeno

Saturday morning (Session 4)

We study the interaction between a neutron and the $\bar D_{s0}^*(2317)$ resonance and look at the amplitude below and slightly above the threshold. The $D_{s0}^*(2317)$ resonance is treated as a molecular state of the $DK$ system with isospin $I=0$. The interaction is investigated using the Fixed Center Approximation (FCA) to the Faddeev equations, where the $DK$ molecule is taken as the...

15. Effective field theory and hadronic molecules

Manuel Pavon Valderrama

Effective field theories are generic low energy expansions of physical processes for which a more fundamental, higher energy description is unknown or unsolvable. They rely on theoretical ingredients such as symmetry and renormalization group analysis. In this talk I discuss a few use cases of effective field theory for hadronic molecules, where QCD is not analytically solvable owing to...

9. Effective range expansion with left-hand cut

Prof. Feng-Kun Guo (ITP, CAS)

Friday afternoon (Session 3)

I will talk about a generalization of effctive range expansion with a left-hand cut due to the t- or u-channel exchange of a particle with a small finit mass. The generalization is constructed using the N/D method of dispersion theory and has a Pade-like form. The applicability will be shown by extracting the NNpi coupling from NN scattering phase shifts using this formalism.

11. Hadron and Charm Physics in São Paulo: A Panoramic Perspective

Prof. Kanchan Khemchandani

Saturday morning (Session 4)

This talk presents an overview of hadron physics research being carried out in São Paulo, focusing closely on the work of the group at the Federal and State University of São Paulo. We review the group's systematic application of unitarized effective field theories, three-body dynamics, and QCD sum rules to decode the non-perturbative regime. We discuss how these phenomenological results offer...

8. interaction and correlation functions of external particles with molecular states

Prof. Eulogio Oset (IFIC)

Saturday morning (Session 4)

I shall report on the interaction of external particles with molecular states made from the interaction of mesons, evaluating the scattering matrix and the correlation function. In particular I shall discuss the cases:
$p f_1(1285)$, n $D^*_{s0}(2317)$, $n\,\bar{D}_{s1}(2460)$ and $n\,\bar{D}_{s1}(2536)$, $K f_1(1285)$, $K D_{s0}^*(2317)$, $\pi f_1(1285)$ and $ \eta f_1(1285)$ and ...

10. On the possible existence of a S=−3,I=1 pentaquark

Isaac Vidana (Istituto Nazionale di Fisica Nucleare)

Saturday morning (Session 4)

In this exploratory work we analyze the possible existence of a strangeness $S=-3$, isospin $I=1$ pentaquark state $P_{sss}$ generated dynamically from the $\bar{K}\Xi$ interaction. We employ a unitarized scheme in coupled channels based on the chiral Lagrangian expanded up to next-to-leading order (NLO), and show that the inclusion of the NLO terms can be crucial to provide the necessary...

5. Three-body effects in excited hadrons

Michael Doering (George Washington University)

Friday afternoon (Session 3)

Many excited mesons decay to three hadrons. Some of them are not even resonances but kinematic enhancements from three particles being on-shell in a triangle configuration. Other systems are dynamically generated from three-body interactions leading to resonance poles. Examples for these phenomena from phenomenology and lattice QCD is presented involving the $K(1460)$, $\pi(1300)$,...