Verification Plots (May-2001)

* Thanks a lot Suyong for generating this sample! *

Monte Carlo Sample

process ttbar

min bias 2.5

events 5K

psim p00.00.00

preco p00.00.00
Event Reconstruction
- tracking efficiency within jets vs eta
- tracking efficiency within jets vs pT
- q/pT for tracks within jets
- jet pT spectrum (all jets)
- quark pt - b-jet pT relative difference
- b-jet efficiency vs pT
- primary vertex efficiency vs. z
- primary vertex resolution
- primary vertex pull distribution
- Primary vertex efficiency
  
  Reconstruction Selection
  
  central region 0.0 0.0
  
  acceptance region 0.0 0.0
- secondary vertex multiplicity within b-quarks

Tagging Efficiency (per jet)

b,c and light-quark jet tagging efficiency

b-tagging efficiency vs. pT	b-tagging efficiency vs. E	b-tagging efficiency vs. eta
c-tagging efficiency vs. pT	c-tagging efficiency vs. E	c-tagging efficiency vs. eta
light-tagging efficiency vs. pT	light-tagging efficiency vs. E	light-tagging efficiency vs. eta

b-tagging purity

b-tagging purity vs. pT

b-tagging purity vs. E

b-tagging purity vs. eta

b-tagging multiplicity

b-tagging efficiency vs. purity (per jet)

Vs. decay length significance	efficiency	purity	rejection	efficiency vs. purity
Vs. vertex-jet DR matching	efficiency	purity	rejection	efficiency vs. purity

Summary

pT (jet) > 0 GeV
|eta| (jet) < 3
vertex-jet matching = 0.3
vertex decay length significance > 3

b-tagging efficiency and background rejection per jet

b-tagging efficiency	0.461 +/- 0.006
c-tagging efficiency	0.115 +/- 0.008
light-tagging efficiency	0.0062 +/- 0.0006
background rejection	0.983 +/- 0.001

Single and double b-tagging efficiency per event

1 b-tag 2 b-tags

0.69 0.23

Last updated: 04/21/01

Ariel Schwartzman