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Measurement of the t t¯ production cross section in pp¯ collisions at √s = 1.96 TeV using lepton +jets events with lifetime b-tagging

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>20/10/2005
<mark>Journal</mark>Physics Letters B
Number of pages10
<mark>Original language</mark>English


We present a measurement of the top quark pair (t t¯) production cross section (σt t¯) 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 ormuon),missing transverse energy, and jets in the final state.We employ lifetime-based b-jet identification techniques to further enhance the t ¯t purity of the selected sample. For a top quark mass of 175 GeV, we measure σt ¯t = 8.6+1.6 −1.5(stat. + syst.) ±0.6(lumi.) pb, in agreement with the standard model expectation.

Bibliographic note

Author list is partial - see original article for full author list.