https://doi.org/10.1051/epjconf/202533302004
The use of many-body methods for the calculation of meson-like spectra
1 Instituto de Ciencias Nucleares, Ciudad Universitaria, Mexico-City, México.
2 Instituto de Educación Media Superior de la Ciudad de Mexico, Mexico-City, México.
3 Frankfurt Institute for Advanced Studies, J.W. Von Goethe University, Hessen, Germany.
4 Departamento de Física, Universidad Nacional de la Plata, La Plata, Argentina.
* e-mail: octavio.augusto@ciencias.unam.mx
** e-mail: tochtlicuauhtli.yepez@iems.edu.mx
*** e-mail: hess@nucleares.unam.mx
**** e-mail: osvaldo.civitarese@gmail.com
Published online: 1 August 2025
The study of properties for the low-energy regime of hadronic spectra is a challenging task; e.g. meson-like states require the introduction of effective degrees of freedom, a condition resulting from confinement. This work presents the results of adopting a non-perturbative scheme where quarks are treated as quasiparticles. These quasiparticles interact and by employing many-body techniques, we can describe a spectrum of meson-like states as a collective superposition of quasiquark-pairs followed by calculating their widths. The result of the calculations shows that this scheme is a suitable one to describe meson states up to energies of the order of a couple of GeV.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
