Z to mu mu in ATLAS too
Compare this event to the one from last week. Both are candidates for the decay of a Z-boson into a muon pair (red tracks). The calculated masses are a little different but both are near the Z mass. This is not unusual; it is part of the nature of experimental particle physics. This view shows part of the ATLAS detector, including its framework and the huge toroidal magnets used to nudge the paths of the muons. This deflection gives us the data we need to calculate the mass of the Z-boson from which they came.
Copyright 2010 The ATLAS Experiment at CERN