Subject: RE: Update on UED
From: Greg Landsberg <landsberg@hep.brown.edu>
Date: Sat, 04 Nov 2006 12:39:50 -0500
To: mercadan@fnal.gov, Sergio Lietti <lietti@fnal.gov>, "Sergio F. Novaes" <novaes@fnal.gov>, "Eduardo M. Gregores" <gregores@fnal.gov>

P.S. I just read the description of the plot on Wiki - indeed it appears that you used calorimeter-only MET, so for the 4mu channel it's simply dominated by the detector resolution for a generic minbias event. In the case of electrons, you basically get MET equal in magnitude and opposite in direction to the transverse energy of the Z decaying into two electrons, hence such a tail.

Greg