Measurement of the tt̄ production cross section in pp̄ collisions at √s=1.96 TeV using events with large Missing E_T and jets

Journal Article · Tue Aug 09 00:00:00 EDT 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.84.032003· OSTI ID:1021044

Aaltonen, T. ^[1]

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1. et al.

In this paper we report a measurement of the t{anti t} production cross section in pp̄ collisions at √s = 1.96 TeV using data corresponding to an integrated luminosity of 2.2 fb^-1 collected with the CDF II detector at the Tevatron accelerator. We select events with significant missing transverse energy and high jet multiplicity. This measurement vetoes the presence of explicitly identified electrons and muons, thus enhancing the tau contribution of ttMs; decays. Signal events are discriminated from the background using a neural network and heavy flavor jets are identified by a secondary-vertex tagging algorithm. We measure a tt̄ production cross section of 7.99 ± 0.55(stat) ± 0.76(syst) ± 0.46(lumi) pb, assuming a top mass m_top = 172.5 GeV/c², in agreement with previous measurements and standard model predictions.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Contributing Organization: CDF
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1021044
• Report Number(s): FERMILAB-PUB-11-210-E-PPD; arXiv:1105.1806; oai:inspirehep.net:899116; TRN: US201116%%691
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 84, Issue 3; ISSN 1550-7998
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COLLISIONS
CROSS SECTIONS
ELECTRONS
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
FLAVOR
GEV RANGE
JET MODEL
LUMINOSITY
MASS
MULTIPLICITY
MUONS
NEURAL NETWORKS
PAIR PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
STANDARD MODEL
TEV RANGE 01-10
TRANSVERSE ENERGY
Experiment-HEP