Measurement of the Top Pair Production Cross Section using RomaNN with 4.3 fb-1 (CDFnote 10022)

Justin Keung, Evelyn Thomson
University of Pennsylvania
Chris Neu
University of Virginia
Tom Schwarz
University of California - Davis

Documentation

Public Conference Note


Send mail to authors

Abstract

The cross section of pair produced top quarks has been measured to be
6.88+-0.29stat+-0.83sys+-0.42lumi
using 4.3 fb-1 of collected data from the high Pt lepton triggers. The measurement is performed with TightRomaNN tagged lepton plus jets events with >= 3 tight jets, Ht >= 230 GeV, and MET >= 20 GeV. This measurement has taken the top mass to be 172.5GeV/c2.
This result is consistent with the CDF combination 7.50+-0.31stat+-0.34sys+-0.15lumi (Last updated 08/14/2009, combination up to 4.6 fb-1).




Plots & Tables

(click to enlarge)

Histogram of expected and observed number of events as a function of jet multiplicity for events with at least one RomaNN "tag", and additional selection Ht > 230 GeV, and MET > 20 GeV.

Table of the expected and observed number of events as a function of jet multiplicity for events with at least one RomaNN "tag", and additional selection Ht > 230 GeV, and MET > 20 GeV.

Table of systematic uncertainties on the measured cross section.

Sum of the transverse energy of jets, lepton, and missing Et in events with 3jets.

Missing Transverse Energy in events with 3jets.

b Jet Transverse Energy in events with 3jets.

Leading Jet Transverse Energy in events with 3jets.

Lepton Transverse Momentum in events with 3jets.

Sum of the transverse energy of jets, lepton, and missing Et in events with 4jets.

Missing Transverse Energy in events with 4jets.

b Jet Transverse Energy in events with 4jets.

Leading Jet Transverse Energy in events with 4jets.

Lepton Transverse Momentum in events with 4jets.

Sum of the transverse energy of jets, lepton, and missing Et in events with 5 or more jets.

Missing Transverse Energy in events with 5 or more jets.

b Jet Transverse Energy in events with 5 or more jets.

Leading Jet Transverse Energy in events with 5 or more jets.

Lepton Transverse Momentum in events with 5 or more jets.
Last Update on Jan 8th, 2010 keungj@fnal.gov