Mass and width of $$T_{c\bar{c}}(4020)$$ in the developed Bethe–Salpeter theory
Abstract
Abstract In experiments exotic meson resonance $$T_{c\bar{c}}(4020)$$ T c c ¯ ( 4020 ) lies above the $$D^{*}\bar{D}^{*}$$ D ∗ D ¯ ∗ threshold, and in principle one can not explain $$T_{c\bar{c}}(4020)$$ T c c ¯ ( 4020 ) as a meson-meson bound state because meson-meson bound state must lie below the $$D^{*}\bar{D}^{*}$$ D ∗ D ¯ ∗ threshold. In this work, exotic resonance $$T_{c\bar{c}}(4020)$$ T c c ¯ ( 4020 ) is considered as an unstable meson-meson molecular state $$D^{*}\bar{D}^{*}$$ D ∗ D ¯ ∗ , and the developed Bethe–Salpeter theory for dealing with unstable state is applied to investigate resonance $$T_{c\bar{c}}(4020)$$ T c c ¯
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
Cold Atom Physics and Bose-Einstein Condensates
Physics of Superconductivity and Magnetism
Publication details
- Journal / source
- The European Physical Journal C
- Publisher
- Springer Science and Business Media LLC
- Volume
- 86
- Issue
- 5
- Publication date
- 3 May 2026
- Language
- EN