n class="p">])</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">likelihood</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">mu</span><span class="p">,</span> <span class="n">nu</span><span class="p">:</span> <span class="n">MultipleIndependent</span><span class="p">(</span>
            <span class="c1"># signal, background</span>
            <span class="n">dists</span><span class="o">=</span><span class="p">[</span><span class="n">Poisson</span