Fig. 2.

Fits to the reconstructed kaon mass distributions, for the two most sensitive ${\text{BDT}}_{\mathrm{cb}}$ bins in the two trigger categories, TOS${}_{\mathit{\mu }}$ and TOS${}_{\mathit{\mu }\mathit{\mu }}$. The fitted model is shown as the solid blue line, while the combinatorial background and $K_{\mathrm{S}}^0\to {\mathit{\pi }}^{+}{\mathit{\pi }}^{-}$ double misidentification are overlaid with dotted red and dashed green lines, respectively. For each fit, the pulls are shown on the lower smaller plots