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- W1868408241 abstract "We propose a new explanation for the long-standing puzzle of the tiny branching fraction of ${ensuremath{psi}}^{ensuremath{'}}ensuremath{rightarrow}ensuremath{rho}ensuremath{pi}$ relative to that for $J/ensuremath{psi}ensuremath{rightarrow}ensuremath{rho}ensuremath{pi}$. In the case of $J/ensuremath{psi}$, we argue that this decay is dominated by a higher Fock state in which the $coverline{c}$ pair is in a color-octet $^{3}S_{1}$ state and decays via the annihilation process $coverline{c}ensuremath{rightarrow}qoverline{q}$. In the case of the ${ensuremath{psi}}^{ensuremath{'}}$, we argue that the probability for the $coverline{c}$ pair in this higher Fock state to be close enough to annihilate is suppressed by a dynamical effect related to the small energy gap between the mass of the ${ensuremath{psi}}^{ensuremath{'}}$ and the $Doverline{D}$ threshold." @default.
- W1868408241 created "2016-06-24" @default.
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- W1868408241 date "1998-06-08" @default.
- W1868408241 modified "2023-09-26" @default.
- W1868408241 title "An Explanation for the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=italic>ρ</mml:mi><mml:mi>−</mml:mi><mml:mi mathvariant=italic>π</mml:mi></mml:math>Puzzle of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=italic>J</mml:mi><mml:mi>/</mml:mi><mml:mi mathvariant=italic>ψ</mml:mi></mml:math>and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow…" @default.
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- W1868408241 doi "https://doi.org/10.1103/physrevlett.80.5060" @default.
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