Physics of the top quark at D0: New measurement of the production cross-section and mass
Conference
·
· Frascati Phys.Ser.
OSTI ID:565068
- Fermilab
We present a measurement of the t{anti t} production cross section in p{anti p} collisions at {radical}s = 1.8 TeV and a measurement of top quark mass m{sub t} by the D0 experiment at the Fermilab Tevatron. The measurements are based on the data from the 1992- 1996 run during which the D0 detector was exposed to the integrated luminosity of approximately 125 pb{sup -1}. We observe 39 t{anti t} candidate events in the dilepton and lepton+jets decay channels with an expected background of 13.7 {+-} 2.2 events. We measure the top quark mass m{sub t} using a two constraint fit to m{sub t} in t{anti t} {yields} bW{sup +} {anti b}W{sup -} final states with one W decaying to q{anti q} and the other to e{nu} or {mu}{nu}. Events are binned in the fit mass versus a measure of probability for events to be the signal rather than a background. Likelihood fits to the data yield m{sub t} = 173.3 {+-} 5.6 (stat) {+-} 6.2 (syst) GeV/c{sup 2}. For this mass we measure the t{anti t} production cross section to be 5.5 {+-} 1.8 pb.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- D0
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 565068
- Report Number(s):
- FERMILAB-CONF-97-233-E; oai:inspirehep.net:446439
- Conference Information:
- Journal Name: Frascati Phys.Ser. Journal Volume: 9
- Country of Publication:
- United States
- Language:
- English
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