Artigo
Measurement of the t(t)over-bar production cross section in p(p)over-bar collisions at root s=1.96 TeV using lepton plus jets events with lifetime b-tagging
Fecha
2005-10-20Registro en:
Physics Letters B. Amsterdam: Elsevier B.V., v. 626, p. 35-44, 2005.
0370-2693
10.1016/j.physletb.2005.08.103
WOS:000232859700005
Autor
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (Unesp)
Univ Alberta
Simon Fraser Univ
York Univ
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Inst High Energy Phys
Univ Sci & Technol China
Universidad de los Andes
Charles Univ
Czech Tech Univ
Acad Sci Czech Republ
Univ San Francisco Quito
Univ Clermont Ferrand
Univ Grenoble 1
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CNRS
Univ Paris 04
Univ Paris 07
CEA Saclay
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CINVESTAV
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Dubna Joint Nucl Res Inst
Institute for Theoretical and Experimental Physics (ITEP)
Moscow MV Lomonosov State Univ
Petersburg Nucl Phys Inst
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Royal Inst Technol
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Resumen
We present a measurement of the top quark pair (t (t) over bar) production cross section (sigma(t (t) over bar)) in pp collisions at root s = 1.96 TeV using 230 pb(-1) of data collected by the DO experiment at the Fermilab Tevatron Collider. We select events with one charged lepton (electron or muon), missing transverse energy, and jets in the final state. We employ lifetime-based b-jet identification techniques to further enhance the t F purity of the selected sample. For a top quark mass of 175 GeV, we measure sigma(t (t) over bar) 8.6(-1.5)(+1.6) (stat. + syst.) +/- 0.6(lumi.) pb, in agreement with the standard model expectation. (c) 2005 Published by Elsevier B.V.