The open-charm radiative and pionic decays of molecular charmonium Y(4274)

Abstract

In this work, we investigate the decay widths and the line shapes of the open-charm radiative and pionic decays of Y(4274) with the $D_s{\bar{D}}_{s0}(2317)$ molecular charmonium assignment. Our calculation indicates that the decay widths of $Y(4274)\to D_s^{+}{D}_s^{\ast -}\gamma$ and $Y(4274)\to D_s^{+}{D}_s^{-}{\pi }^0$ can reach up to 0.05 keV and 0.75 keV, respectively. In addition, the result of the line shape of the photon spectrum of $Y(4274)\to D_s^{+}{D}_s^{\ast -}\gamma$ shows that there exists a very sharp peak near the large end point of photon energy. The line shape of the pion spectrum of $Y(4274)\to D_s^{+}{D}_s^{\ast -}{\pi }^0$ is similar to that of the pion spectrum of $Y(4274)\to D_s^{+}{D}_s^{\ast -}\gamma$, where we also find a very sharp peak near the large end point of pion energy. According to our calculation, we suggest further experiments to carry out the search for the open-charm radiative and pionic decays of Y(4274).

7 pages, 6 figures, 1 table. Published version

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