Coupling hadron-hadron thresholds within a chiral quark model approach
| Autor: | Pablo G. Ortega, David R. Entem |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Particle physics
Physics and Astronomy (miscellaneous) Meson General Mathematics High Energy Physics::Lattice Hadron Nuclear Theory FOS: Physical sciences 01 natural sciences High Energy Physics - Phenomenology (hep-ph) Simple (abstract algebra) Hadron spectroscopy 0103 physical sciences Computer Science (miscellaneous) virtual states 010306 general physics Nuclear Experiment Physics 010308 nuclear & particles physics lcsh:Mathematics Quark model High Energy Physics::Phenomenology naive quark model unquenched quark model lcsh:QA1-939 3. Good health hadron resonances Coupling (physics) High Energy Physics - Phenomenology Chemistry (miscellaneous) Excited state coupled channels High Energy Physics::Experiment |
| Zdroj: | Symmetry Symmetry, Vol 13, Iss 279, p 279 (2021) Volume 13 Issue 2 |
| Popis: | Heavy hadron spectroscopy was well understood within the naive quark model until the end of the past century. However, in 2003, the $X(3872)$ was discovered, with puzzling properties difficult to understand in the simple naive quark model picture. This state made clear that excited states of heavy mesons should be coupled to two-meson states in order to understand not only the masses but, in some cases, unexpected decay properties. In this work we will review how the naive quark model can be complemented with the coupling to two hadron thresholds. This program has been already applied to the heavy meson spectrum with the chiral quark model and we show some examples where thresholds are of special relevance. 24 pages, 8 figures, 5 tables |
| Databáze: | OpenAIRE |
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