Table Of Contents

Two-body decay (Z) results:

ZResults

Some efficiency curves for three-body analyses:

TopEfficiencies

Three-body decay (top vs. di-jets) results:

Here are some results using the SpartyJet script TopTag.py (also in boost2011/code in the SVN). I'm using the Herwig top and dijet samples from 2010, pT 500-600, available here:

• ttbar (Herwig 6.5; 500 < pT < 600 GeV)

• dijets (Herwig 6.5; 500 < pT < 600 GeV)

The plots are all made with the SJ GUI.

• cos(theta_h) for dijets (140 < m_jet < 210):
  

• jet mass in dijet events:
  

• NSubjettines (tau3/tau2) for tops and dijets:
  

• cos(theta_h) for tops (140 < m_jet < 210):
  

• jet mass in ttbar events:
  

• W mass (defined in several different ways) in top events (140 < m_jet < 210):
  

• Thaler and Wang z_cell variable:
  

• ATLAS z_cut variables (last four splittings):
  

N-subjettiness with grooming (top vs. dijets)

Some initial indications suggest that some of the grooming procedures may affect the ability to utilize N-subjettiness as a top-tagger (positively and perhaps negatively). The goal of this study is to investigate what that affect may be with the BOOST 2010 benchmark samples, and then to see how much pile-up affects that result (the latter being the real goal).

• Miller_Tau32WithGrooming_26July2011.pdf: Slides shown during the 26 July 2011 BOOST 2011 comparisons meeting.

-- ChristopherVermilion - 29 Aug 2011