Young@INFN 2025: 3rd event

by Davide Germani (Istituto Nazionale di Fisica Nucleare)

Thursday 15 May 2025, 16:30 → 18:30 Europe/Rome

Sala Direzione INFN (Dipartimento di Fisica - Edi. Marconi)

1st speaker: Davide Germani
Title: "The X(3872) Puzzle: Insights from EFT"

Abstract: "The (in)famous X(3872) was the first exotic particle discovered in 2003, compatible with a tetraquark interpretation. More than twenty years have passed since then, yet its internal dynamic remain an open question. Currently, the most established models describe the X(3872) either as a compact tetraquark, where quarks interact via color forces, or as a D0D0bar mesonic molecule, given that its mass is incredibly close to the di-meson threshold. The study of the internal dynamics of exotic particles provides a fundamental probe for understanding QCD in its confinement regime. In this talk, we will explore how the language of non-relativistic effective field theories can be applied to study the nature of the X(3872), drawing inspiration from well-established approaches used to describe low-energy proton-neutron interactions. Finally, we will discuss our findings in light of the results produced by LHCb and in anticipation of upcoming analyses."

Non relativistic EFT.pdf