Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apri14011b&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present the prospects for a measurement of the cross section of t \overlinet pairs produced in p \overlinep collisions at a center of mass energy of 1.96 TeV and decaying to six quarks using the DØdetector. The background to t \overlinet pair production in the all hadronic decay mode consists of QCD processes. The cross section for the background processes is several orders of magnitude larger than the signal cross section. A characteristic signature of t \overlinet decays is the presence of two b-jets in the final state. The DØexperiment has recently been upgraded with a new silicon vertex detector, which greatly enhances its b-quark identification capability. We discuss how the improved b-tagging capabilities of the detector can be used to significantly improve the measurement of the top quark pair production cross section in the all hadronic channel. We discuss the expected accuracy of the production cross section based on one year of data taking at the DØexperiment, approximately equivalent to a luminosity of 500 pb-1.
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