Orateur
Description
This poster presents a study of the spectrum of heavy tetraquarks within the Curci-Ferrari model, a low-energy effective framework for QCD in which gluons acquire an effective mass. Starting from the Curci-Ferrari Lagrangian, we derive an effective quark interaction potential and employ it to study heavy hadrons in the non-relativistic regime.
Tetraquarks are described within the diquark-antidiquark picture, reducing the four-body problem to an effective two-body system. Before computing the tetraquark spectrum, the model parameters, including the gluon mass, are determined by reproducing the spectra of heavy quarkonia and the Bc meson.
The resulting tetraquark spectrum is consistent with other theoretical approaches and, for fully charmed tetraquarks, is compatible with the available experimental candidates. These results support the Curci-Ferrari model as an effective framework for low-energy hadron spectroscopy.
We also examine the role of the gluon mass in meson and tetraquark spectroscopy. While simplified descriptions exhibit only a weak dependence on this parameter, a more complete treatment incorporating renormalization group running shows that the gluon mass plays a crucial role in reproducing the meson spectrum, favoring values of approximately 0.8 GeV.
The present framework provides a consistent starting point for extending the study to other heavy exotic hadrons and additional observables within the Curci-Ferrari approach.
| Working Group | WG4. QCD models and non-perturbative QCD |
|---|---|
| Type of oral contribution | Theory |