But this prediction is not limited to c quarks. It also works with s quarks instead, b→ ss̅s. We measured that too in https://t.co/uRwFuTgoGI (@_nikhef's @Sean1987 leading). That's more difficult as the decay is rarer.
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Measurement of the $B_s^0 \to \phi \phi$ branching fraction and search for the decay $B^0 \to \phi \phi$. http://t.co/LTZrU5wrL1
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Much improved upper limit: Measurement of the B0s→φφ branching fraction and search for the decay B0→φφ http://t.co/1NeqyrfjX5
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Much improved upper limit: Measurement of the B0s→φφ branching fraction and search for the decay B0→φφ http://t.co/1NeqyrfjX5