The di-muon dataset is skimmed for J/&psi events using the cuts listed in Table 1. The resulting &mu&mu mass distribution can be seen in Figure 1. We use the signal region of |M(J/&psi)-3.09687|<0.05 for our Bc search and the sideband regions of 0.10<|M(J/&psi)-3.09687|<0.20 for background studies. |
Table 1: The cuts applied to the J/&psi legs. |
Figure 1: Distribution of reconstructed mass for J/&psi ->&mu&mu candidates with a double Gaussian and quadratic polynomial fit superimposed. The green area shows the mass window used in the J/&psi+track search , while the aqua areas show the sideband windows used in the fake J/&psi background calculation. |