Radiative and pionic transitions $Z_c(4020)^0 \to X(3872) \gamma$ and $Z_c(4020)^\pm \to X(3872) \pi^\pm$

Autor: Voloshin, M. B.
Rok vydání: 2019
Předmět:
Zdroj: Phys. Rev. D 99, 054028 (2019)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevD.99.054028
Popis: The radiative transitions from the neutral exotic $Z_c(4020)^0$ resonance to $X(3872)$ with emission of a photon and the pionic transitions from the charged $Z_c(4020)^\pm$ to $X(3872)$ and a charged pion $\pi^\pm$ are considered for both charmoniumlike states being charmed meson-antimeson molecules. The underlying processes for these transitions are the decays of the charmed vector meson to pseudoscalar plus a photon or a pion. It is found that the discussed transition rates typically amount to a branching fraction of several permil with a peak at the vector meson pair threshold.
Comment: 9 pages, 4 figures
Databáze: arXiv
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