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Observation of High Momentum<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">η</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>Production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">B</mml:mi></mml:math>Decays
We report the first observation of $B\to \eta' X$ transitions with high momentum $\eta'$ mesons. We observe $39.0\pm 11.6$ B decay events with $2.0< p_{\eta'} < 2.7$ GeV/c, the high momentum region where background from $b\to c$ processes is suppressed. We discuss the physical interpretation of the signal, including the …