Figure 8

(a) The number of J/ψK _s candidates in the signal region with either a B⁰ tag $\left(N_{B^0}\right)$ , or a ${\overline{B}}^0$ tag $\left(N_{{\overline{B}}^0}\right)$ as a function of Δ t. (b) The raw asymmetry, $\left(N_{B^0}-N_{{\overline{B}}^0}\right)/\left(N_{B^0}+N_{{\overline{B}}^0}\right)$. The solid (dashed) curves represent the fit projections as functions of Δt for both B⁰ and ${\overline{B}}^0$ tags. The shaded regions represent the estimated background contributions.