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Title: Combination of CDF and D0 results on the mass of the top quark using up $$9.7\:{\rm fb}^{-1}$$ at the Tevatron

Abstract

We summarize the current top quark mass (m t) measurements from the CDF and D0 experiments at Fermilab. We combine published results from Run I (1992–1996) with the most precise published and preliminary Run II (2001–2011) measurements based on $$p\bar{p}$$ data corresponding to up to 9.7 fb $-$1 of $$p\bar{p}$$ collisions. Taking correlations of uncertainties into account, and combining the statistical and systematic contributions in quadrature, the preliminary Tevatron average mass value for the top quark is m t = 174.30 ± 0.65 GeV/c 2, corresponding to a relative precision of 0.37%.

Authors:
 [1];  [1]
  1. Fermilab
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)
Contributing Org.:
CD and D0 Collaborations
OSTI Identifier:
1329707
Report Number(s):
FERMILAB-CONF-16-298-E; arXiv:1608.01881
1479761
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: TEVEWWG/top2014/01, Fermilab, Jul 2014
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Tevatron Electroweak Working Group, Tevatron Group, and Aaltonen, T. Combination of CDF and D0 results on the mass of the top quark using up $9.7\:{\rm fb}^{-1}$ at the Tevatron. United States: N. p., 2016. Web.
Tevatron Electroweak Working Group, Tevatron Group, & Aaltonen, T. Combination of CDF and D0 results on the mass of the top quark using up $9.7\:{\rm fb}^{-1}$ at the Tevatron. United States.
Tevatron Electroweak Working Group, Tevatron Group, and Aaltonen, T. Fri . "Combination of CDF and D0 results on the mass of the top quark using up $9.7\:{\rm fb}^{-1}$ at the Tevatron". United States. doi:. https://www.osti.gov/servlets/purl/1329707.
@article{osti_1329707,
title = {Combination of CDF and D0 results on the mass of the top quark using up $9.7\:{\rm fb}^{-1}$ at the Tevatron},
author = {Tevatron Electroweak Working Group, Tevatron Group and Aaltonen, T.},
abstractNote = {We summarize the current top quark mass (mt) measurements from the CDF and D0 experiments at Fermilab. We combine published results from Run I (1992–1996) with the most precise published and preliminary Run II (2001–2011) measurements based on $p\bar{p}$ data corresponding to up to 9.7 fb$-$1 of $p\bar{p}$ collisions. Taking correlations of uncertainties into account, and combining the statistical and systematic contributions in quadrature, the preliminary Tevatron average mass value for the top quark is mt = 174.30 ± 0.65 GeV/c2, corresponding to a relative precision of 0.37%.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Aug 05 00:00:00 EDT 2016},
month = {Fri Aug 05 00:00:00 EDT 2016}
}

Conference:
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  • We summarize the current top-quark mass measurements from the CDF and D0 experiments at Fermilab. We combine published Run I (1992--1996) results with the most precise published and preliminary Run II (2001--2011) measurements based on data corresponding to up to 9.7 fbmore » $$^{-1}$$ of $$p\bar{p}$$ collisions. Taking correlations of uncertainties into account, and combining the statistical and systematic uncertainties, the resulting preliminary Tevatron average mass of the top quark is $$M_{top} = 174.34 \pm 0.64 ~GeV/c^2$$, corresponding to a relative precision of 0.37%.« less
  • We summarize the top-quark mass measurements from the CDF and D0 experiments at Fermilab. We combine published Run I (1992--1996) measurements with the most precise published and preliminary Run II (2001--present) measurements using up to 5.8 fb{sup -1} of data, adding new analyses (the missing transverse energy plus jets analysis) and updating old ones. Taking uncertainty correlations into account, and adding in quadrature the statistical and systematic uncertainties, the resulting preliminary Tevatron average mass of the top quark is M{sub t} = 173.2 {+-} 0.9 GeV/c{sup 2}.
  • A summary of the most up-to-date top quark mass measurements at CDF is presented. These analyses use top-antitop candidate events detected in the CDF experiment at the Tevatron collider with an integrated luminosity of up to {approx}3/fb. The combination of all those measurements together with the corresponding top mass measurements from the concurrently running D0 experiment at the Tevatron yields a world average of M{sub t} = [173.1 {+-} 0.6(stat.) {+-} 1.1(syst.)] GeV/c{sup 2}.
  • The top quark is a very special fundamental particle in the Standard Model (SM) mainly due to its heavy mass. The top quark has extremely short lifetime and decays before hadronization. This reduces the complexity for the measurement of its mass. The top quark couples very strongly to the Higgs boson since the fermion-Higgs Yukawa coupling linearly depends on the fermion’s mass. Therefore, the top quark is also heavily involved in Higgs production and related study. A precise measurement of the top quark mass is very important, as it allows for self-consistency check of the SM, and also gives a insight about the stability of our universe in the SM context. This dissertation presents my work on the measurement of the top quark mass in dilepton final states of tmore » $$\bar{t}$$ events in p$$\bar{p}$$ collisions at √s = 1.96 TeV, using the full DØ Run II data corresponding to an integrated luminosity of 9.7 fb -1 at the Fermilab Tevatron. I extracted the top quark mass by reconstructing event kinematics, and integrating over expected neutrino rapidity distributions to obtain solutions over a scanned range of top quark mass hypotheses. The analysis features a comprehensive optimization that I made to minimize the expected statistical uncertainty. I also improve the calibration of jets in dilepton events by using the calibration determined in t$$\bar{t}$$ → lepton+jets events, which reduces the otherwise limiting systematic uncertainty from the jet energy scale. The measured mass is 173.11 ± 1.34(stat) +0.83 -0.72(sys) GeV .« less