Radiative and meson decays of $Y(4230)$ in flavor SU(3)
| Autor: | Luciano Maiani, Veronica Riquer, Antonio D. Polosa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Particle physics
Physics and Astronomy (miscellaneous) Meson General Mathematics Nuclear Theory MathematicsofComputing_GENERAL FOS: Physical sciences exotic hadron spectroscopy 01 natural sciences Pion High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences QA1-939 Computer Science (miscellaneous) multiquark hadrons 010306 general physics Nuclear Experiment Physics quark model 010308 nuclear & particles physics Quark model Parity (physics) Exotic hadron Particle Physics Exotic Hadron Spectroscopy Pseudoscalar High Energy Physics - Phenomenology TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES Chemistry (miscellaneous) Isospin Tetraquark High Energy Physics::Experiment Mathematics |
| Zdroj: | Symmetry Volume 13 Issue 5 Symmetry, Vol 13, Iss 751, p 751 (2021) |
| DOI: | 10.48550/arxiv.2103.14356 |
| Popis: | The charmonium-like exotic states $Y(4230)$ and the less known $Y(4320)$, produced in $e^+e^-$ collisions, are sources of positive parity exotic hadrons in association with photons or pseudoscalar mesons. We analyze the radiative and pion decay channels in the compact tetraquark scheme, with a method that proves to work equally well in the most studied $D^*\to \gamma/\pi+D$ decays. The decay of the vector $Y$ into a pion and a $Z_c$ state requires a flip of charge conjugation and isospin that is described appropriately in the formalism used. Rates however are found to depend on the fifth power of pion momentum which would make the final states $\pi Z_c(4020)$ strongly suppressed with respect to $\pi Z_c(3900)$. The agreement with BES III data would be improved considering the $\pi Z_c(4020)$ events to be fed by the tail of the $Y(4320)$ resonance under the $Y(4230)$. These results should renovate the interest in further clarifying the emerging experimental picture in this mass region. Comment: no figures |
| Databáze: | OpenAIRE |
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