Boosted Tau Lepton as a Microscope and Macroscope

Figure 1

Sample tracks from long lived lepton produced at a muon collider with center of mass energy equals 3 TeV. undergoes 3-prong decay while decays to plus two neutrinos. For illustration purposes, lifetime is set to 5 (10) times the mean life time. The blue and green solid lines indicate the tau tracks which can be matched with the displaced vertex (the cross point of the three charged pions) and the decayed muon track (in purple), respectively. The green dashed line indicates the original direction of muon velocity.