$η_{c}\rightarrow l^{+}l^{-}$ and $χ_{c0}\rightarrow l^{+}l^{-}$ decays revisited

preprint2016arXivOpen access

We present a calculation of $η_{c}\rightarrow l^{+}l^{-}$ and $χ_{c0}\rightarrow l^{+}l^{-}$ 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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$η_{c}\rightarrow l^{+}l^{-}$ and $χ_{c0}\rightarrow l^{+}l^{-}$ decays revisited

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ηc→l+l−η_{c}\rightarrow l^{+}l^{-}ηc​→l+l− and χc0→l+l−χ_{c0}\rightarrow l^{+}l^{-}χc0​→l+l− decays revisited

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$η_{c}\rightarrow l^{+}l^{-}$ and $χ_{c0}\rightarrow l^{+}l^{-}$ decays revisited