Probability of signal events in bins of GL obtained from the inclusive sample of TIS $ B^0_{q}\rightarrow h^+h^{'-}$ events (solid squares). The background probability (open circles) is obtained from the events in the sidebands of the $\mu\mu$ invariant mass distribution in the $ B ^0_s$ mass window.

Fit of the invariant mass distribution for $ B^0_{q}\rightarrow h^+h^{'-}$ candidates in the $ {\rm GL}$ range [0.25, 1.0]. The pink dashed curve is the combinatorial background component, while the physical background is shown with a light-blue dotted curve. The remaining contributions are from the two-body decays of the $ B ^0$ , $ B ^0_s$ and $\Lambda^0_b$ .

Distribution of the $\mu\mu$ invariant mass for different $ {\rm GL}$ bins: (a) $[0,0.25]$, (b) $[0.25,0.5]$, (c) $[0.5,0.75]$, (d) $[0.75,1.0]$. The blue solid lines show the interpolation model used and the dashed line shows the result of the interpolation in the search windows.

Observed distribution of selected dimuon events in the GL {\it vs} invariant mass plane. The orange short-dashed (green long-dashed) lines indicate the $\pm 60 {\mathrm{ Me V /}c^2} $ search window around the $ B ^0_s$ ( $ B ^0$ ).

(a) Observed (solid curve) and expected (dashed curve) $\textrm{CL}_{\textrm{s}}$ values as a function of $ {\cal B}( B ^0_s \rightarrow \mu ^+ \mu ^- )$ . The green shaded area contains the $\pm 1 \sigma$ interval of possible results compatible with the expected value when only background is observed. The 90 % (95 %) C.L. observed value is identified by the solid (dashed) line. (b) the same for $ {\cal B}( B ^0 \rightarrow \mu ^+ \mu ^- )$ .

Animated gif made out of all figures.

Summary of the factors and their uncertainties needed to calculate the normalization factors ($\alpha_{ B^0_{q}\rightarrow \mu^+\mu^- }$) for the three normalization channels considered. The branching ratios are taken from Refs. [14,16]. The trigger efficiency and number of $ B ^0 \rightarrow K^+\pi^-$ candidates correspond to only TIS events, as described in the text.

Probability of signal events in bins of GL obtained from the inclusive sample of TIS $ B^0_{q}\rightarrow h^+h^{'-}$ events. The background probability in the $ B ^0_s$ mass window is obtained from the events in the sidebands of the dimuon invariant mass distribution.

Expected background, expected SM signal and observed number of events in bins of $ {\rm GL}$ and invariant mass, in the $\pm 60 {\mathrm{ Me V /}c^2} $ mass window around the $ B ^0_s$ mass central value of 5363.1 $ {\rm MeV}/c^2$ .

Expected background, expected SM signal and observed number of events in bins of $ {\rm GL}$ and invariant mass, in the $\pm 60 {\mathrm{ Me V /}c^2} $ mass window around the $ B ^0$ central value of 5275.0 $ {\rm MeV}/c^2$ .