Radiative decays of theY(3940),Z(3930), and theX(4160)as dynamically generated resonances
| Autor: | Raquel Molina, Eulogio Oset, Tanja Branz |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Meson 010308 nuclear & particles physics Nuclear Theory High Energy Physics::Phenomenology Radiative decay Resonance Vector meson dominance 16. Peace & justice 01 natural sciences Formalism (philosophy of mathematics) 0103 physical sciences Radiative transfer High Energy Physics::Experiment Nuclear Experiment 010306 general physics |
| Zdroj: | Physical Review D. 83 |
| ISSN: | 1550-2368 1550-7998 |
| Popis: | We study the radiative decay properties of the charmoniumlike $X$, $Y$, and $Z$ mesons generated dynamically from vector-meson--vector-meson interaction in the framework of a unitarized hidden-gauge formalism. In the present work, we calculate the one- and two-photon decay widths of the hidden-charm $Y(3940)$, $Z(3930)$ [or $X(3915)$], and $X(4160)$ mesons in the framework of the vector-meson dominance formalism. We obtain good agreement with the experiment in case of the two-photon width of the $X(3915)$, which we associate to the ${2}^{+}$ resonance that we find at 3922 MeV. However, in view of discrepancies with a different approach that also considers the resonances as molecular states, we urge independent calculations along the same lines to further clarify the issue. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|