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First Observation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Λ</mml:mi><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Λ</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> Signals near the <mml:math xmlns:mml="http://…
Using the data sample of 980 fb−1 collected with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we present the results of an investigation of the Λπ+ and Λπ− invariant mass distributions looking for substructure in the decay Λ+c→Λπ+π+π−. We find a significant signal in each mass distribution. …