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Evidence for the Rare Decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msubsup><mml:mi>D</mml:mi><mml:mi>s</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>
We have searched for the rare decay B+→D+sπ0. The analysis is based on a sample of 232×106 Υ(4S)→B¯¯¯B decays collected with the BABAR detector at the SLAC PEP-II e+e− storage ring. We find 19.6 signal events, corresponding to a significance of 4.7σ. The extracted signal yield including statistical and systematic …