Search for the Lepton Flavor Violating Decays <math><mrow><msup><mrow><mi>B</mi></mrow><mrow><mo>+</mo></mrow></msup><mo>→</mo><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>τ</mi></mrow><mrow><mo>±</mo></mrow></msup><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>∓</mo></mrow></msup></mrow></math> (<math><mrow><mo>ℓ</mo><mo>=</mo><mi>e</mi></mrow></math>, <math><mrow><mi>μ</mi></mrow></math>) at Belle

We present a search for the lepton flavor violating decays B+→K+τ&#177;ℓ∓, with ℓ=(e,μ), using the full data sample of 772&#215;106 BB&#175; pairs recorded by the Belle detector at the KEKB asymmetric-energy e+e− collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. We find no evidence for B&#177;→K&#177;τℓ decays and set upper limits on their branching fractions at the 90% confidence level in the (1−3)&#215;10−5 range. The obtained limits are the world’s best results.