Combined Full Muon Chamber Tracks

MUFFIN tries to find combinations of two full muon tracks that are compatible with the combined track as shown in figure 6.5. It calculates a straight line between the two offset vectors of the tracks. This straight line is a better approximation of the muon trajectory than that of the individual muon tracks since the two offset vectors are known to much higher precision than the direction vectors. MUFFIN then removes combined muon tracks for which the angle between the combined track and the individual tracks' direction vector is too large (angles $\alpha$ and $\beta$ in figure 6.5 have to be less than ).

Figure 6.5: The figure shows schematically (in 2D) how MUFFIN combines two muon chamber tracks to one. A muon track consists of an offset and a direction vector, MUFFIN makes a combined muon track as track connecting the two offset vectors but checks if the angles $\alpha$ and $\beta$ are not too large.