Abstract
We present a measurement of the top quark pair (tt¯) production cross section (σtt¯) in pp¯ collisions at s=1.96 TeV using 230 pb−1 of data collected by the DØ 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 tt¯ purity of the selected sample. For a top quark mass of 175 GeV, we measure σtt¯=8.6−1.5+1.6(stat.+syst.)±0.6(lumi.) pb, in agreement with the standard model expectation.
Highlights
We present a measurement of the top quark pair (t t) production cross section in ppcollisions at
Theoretical calculations performed within the framework of the standard model (SM) predict the ttproduction cross section with an uncertainty of less than 15% [2]
We look at the lepton + jets final state which results from the leptonic decay of one of the W bosons and the hadronic decay of the other
Summary
Received 31 May 2005; received in revised form 25 July 2005; accepted 27 August 2005
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