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B - SLAC

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The First B�τν Evidence<br />

� The final results are deduced by unbinned likelihood fit<br />

to the obtained E ECL distributions.<br />

B�τν<br />

Signal<br />

Signal +<br />

background<br />

Background<br />

Signal shape : Gauss + exponential<br />

Background shape : second-order polynomial<br />

+ Gauss (peaking component)<br />

Σ : Statistical Significance<br />

+5.3<br />

Observe 17.2 events in the<br />

-4.7<br />

signal region.<br />

Significance decreased to 3.5 σ<br />

after including systematics<br />

9

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