Figure 2: Residuals of the reconstructed B-vertex with respect to the Monte Carlo position: (a) projected onto the B-flight direction, (b) transverse to the B-flight direction. The dimensions are proper time in fs. Three Gaussians were used in the fits (in the case of the transverse centered at zero), the global resolutions being ca. 32 fs (longitudinally) and 5.4 fs (transversally)—details are in the text.