betchart/susycaf — Issue #16: jets which are muons
Author: betchart
Created: 2012-02-21 07:36:29+00:00
State: open

The xclean code and history are clear: we have never pruned muons, either isolated or non, from any jet collection, which is a problem for the PF jet collection if not for the Calo jets. This constitutes a rather significant bug in the topAsymm analysis in the inclusion of an extra jet, and perhaps other analyses as well (double mu control?). Any analysis which vetoes on isolated muons should be fine.

Killing a jet matched to an isolated muon is straightforward. However, the issue is more subtle in the case of a selection with inverted muon isolation, which topAsymm uses for estimating the multijet background. In that case, one must kill a jet containing a non-isolated muon, but just a single jet, not all jets containing non-isolated muons.

This requires some thought.