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Lattice calculation of $χ_{c0} \rightarrow 2γ$ decay width

Zou, Zuoheng et al.
arXiv (All) · Papers
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high-energy-physics-lattice
We perform a lattice QCD calculation of the $χ_{c0} \rightarrow 2γ$ decay width using a model-independent method which does not require a momentum extrapolation of the corresponding off-shell form factors. The simulation is performed on ensembles of $N_f=2$ twisted mass lattice QCD gauge configurati
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