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- W2600188813 abstract "The observed Y(4260)to gamma + X(3872) decay is a natural consequence of the diquark-antidiquark description of Y and X resonances. In this note we attempt an estimate of the transition rate, Gamma_{rm rad}, by a non-relativistic calculation of the electric dipole term of a diquarkonium bound state. We compute Gamma_{rm rad} for generic composition values of the isospin of X and Y. Specializing to I=0 for X(3872), we find Gamma_{rm rad}= 496~keV for Y(4260) with I=0 and Gamma_{rm rad}= 179~keV for I=1. Combining with BESIII data, we derive upper bounds to B(Yto J/Psi+pi+pi) and to Gamma(Yto mu^+ mu^-). We expect to confront these results with forthcoming data from electron-positron and hadron colliders." @default.
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- W2600188813 date "2015-11-01" @default.
- W2600188813 modified "2023-09-26" @default.
- W2600188813 title "$$Y(4260)rightarrow gamma + X(3872)$$ Y ( 4260 ) → γ + X ( 3872 ) in the diquarkonium picture" @default.
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- W2600188813 doi "https://doi.org/10.1140/epjc/s10052-015-3781-2" @default.
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