We perform a unified analysis of the \ (T₂₂ (3875) ^+\) and \ (₂₁ (3872) \) using an Effective Field Theory (EFT) based on local hidden gauge symmetry. Our model incorporates \ (\) - and \ (\) -meson exchanges, one-pion exchange (OPE) with three-body dynamics, and a bare \ (c c\) state for the \ (₂₁ (3872) \). By fitting energy level data from multiple lattice QCD collaborations, we study the pion-mass dependence of the pole positions. While \ (T₂₂^+\) results align with experimental data, a tension remains for the \ (₂₁ (3872) \) at the physical point, highlighting the need for high-precision lattice simulations at low pion masses. Abstract Published by the Jagiellonian University 2026 authors
Gil-Domínguez et al. (Fri,) studied this question.