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Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>τ</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mi>τ</mml:mi></mml:msub></mml:math>branching fraction
A measurement of the τ−→K−π0ντ branching fraction has been made using 230.2 fb−1 of data recorded by the BABAR detector at the PEP-II e+e− collider, located at the Stanford Linear Accelerator Center (SLAC), at a center-of-mass energy √s close to 10.58 GeV. We measure B(τ−→K−π0ντ)=(0.416±0.003(stat)±0.018(syst))%.Received 18 July 2007DOI:https://doi.org/10.1103/PhysRevD.76.051104©2007 American Physical …