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Title: Measurement of the top quark pair production cross section with 1.12 $$fb^{-1}$$ of $$p\overline{p}$$ collisions at $$\sqrt{s}$$ = 1.96 TeV

Abstract

We present a measurement of the top quark pair production cross section in e+jets and µ+jets events recorded with the CDF II detector. The data correspond to 1.12 fb -1 of pp collisions with center-of-mass energy 1.96 TeV taken during Run 2 of the Fermilab Tevatron. We identify tt candidate events by requiring at least one secondary vertex b-tag, and we measure a production cross section of 8.2 ±0.5 (stat) ±0.8 (syst) ±0.5 (lum) pb, the most precise single measurement of σtt to date. As a check, we also measure σtt in events with multiple b-tagged jets using a higher-efficiency tagging algorithm, and there we measure 8.8 +0.8 -0.7 (stat) ±1.2 (syst) ±0.5 (lum) pb, also the most precise single measurement with this signature. Both results assume a top quark mass of 175 GeV/c 2 , for which the theoretical expectation is 6.7 +0.7 -0.9 pb; the measured excess is of the order 1σ, and becomes less significant at the current world average top mass of 171 GeV/c 2 .

Authors:
 [1]
  1. Harvard Univ., Cambridge, MA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1415816
Report Number(s):
FERMILAB-THESIS-2007-82; AAT-3285547; PROQUEST-1421625931
776426
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Sherman, Daniel Joseph. Measurement of the top quark pair production cross section with 1.12 $fb^{-1}$ of $p\overline{p}$ collisions at $\sqrt{s}$ = 1.96 TeV. United States: N. p., 2007. Web. doi:10.2172/1415816.
Sherman, Daniel Joseph. Measurement of the top quark pair production cross section with 1.12 $fb^{-1}$ of $p\overline{p}$ collisions at $\sqrt{s}$ = 1.96 TeV. United States. doi:10.2172/1415816.
Sherman, Daniel Joseph. Fri . "Measurement of the top quark pair production cross section with 1.12 $fb^{-1}$ of $p\overline{p}$ collisions at $\sqrt{s}$ = 1.96 TeV". United States. doi:10.2172/1415816. https://www.osti.gov/servlets/purl/1415816.
@article{osti_1415816,
title = {Measurement of the top quark pair production cross section with 1.12 $fb^{-1}$ of $p\overline{p}$ collisions at $\sqrt{s}$ = 1.96 TeV},
author = {Sherman, Daniel Joseph},
abstractNote = {We present a measurement of the top quark pair production cross section in e+jets and µ+jets events recorded with the CDF II detector. The data correspond to 1.12 fb-1 of pp collisions with center-of-mass energy 1.96 TeV taken during Run 2 of the Fermilab Tevatron. We identify tt candidate events by requiring at least one secondary vertex b-tag, and we measure a production cross section of 8.2 ±0.5 (stat) ±0.8 (syst) ±0.5 (lum) pb, the most precise single measurement of σtt to date. As a check, we also measure σtt in events with multiple b-tagged jets using a higher-efficiency tagging algorithm, and there we measure 8.8 +0.8 -0.7 (stat) ±1.2 (syst) ±0.5 (lum) pb, also the most precise single measurement with this signature. Both results assume a top quark mass of 175 GeV/c 2 , for which the theoretical expectation is 6.7 +0.7 -0.9 pb; the measured excess is of the order 1σ, and becomes less significant at the current world average top mass of 171 GeV/c 2 .},
doi = {10.2172/1415816},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}

Thesis/Dissertation:
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