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Search for the process<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1835</mml:mn><mml:mo stretchy="false">)</mml:…
We report the results of a search for the X(1835) state in the process e+e−→J/ψX(1835) using a data sample of 672 fb−1 collected with the Belle detector at and near the Υ(4S) resonance at the KEKB asymmetric-energy e+e− collider. No significant evidence is found for this process, and an upper …