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$\eta_{c}\rightarrow l^{+}l^{-}$ and $\chi_{c0}\rightarrow l^{+}l^{-}$ decays revisited
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classification
hep-ph
keywords
rightarrowamplitudesapproximationbranchingscalculationcomputeddecaydecays
abstract
We present a calculation of $\eta_{c}\rightarrow l^{+}l^{-}$ and $\chi_{c0}\rightarrow l^{+}l^{-}$ decay widths. The amplitudes are computed within leading-order approximation using NRQCD framework. Numerical results for the branchings fractions are presented.
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