Evidence for top quark production in 1.8 TeV {bar p}p collisions

Conference · Thu Sep 01 04:00:00 EDT 1994

OSTI ID:10103511

Jensen, H B

This report is a summary of the evidence for top quark production in {bar p}p collisions at a center of mass energy of 1.8 TeV which was obtained by the CDF Collaboration earlier this year. The data analyzed corresponds to an integrated luminosity of 19.3 pb{sup {minus}1}, recorded with the CDF Detector at the Fermilab Tevatron Collider during 1992-1993. Three different search channels for t{bar t} production are used. A search for dilepton events finds 2 events, while two different methods of identifying b-quark jets in events with W+ {ge} 3 jets finds 6 and 7 events, respectively. The probability that the observed total yield is consistent with the estimated background of 5.96{sub {minus}0.44}{sup +0.49} is 0.26%. Though the statistics are too limited to firmly establish the existence of the top quark, a natural interpretation of the excess is that it is due to t{bar t} production. Under this assumption, constrained mass fitting of a subset of events yields a top quark mass of 174{+-}10{sub {minus}12}{sup +13} GeV/c{sup 2} and a t{bar t} production cross section of 13.9{sub {minus}4.8}{sup +6.1}pb.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 10103511
• Report Number(s): FNAL/C--94/339-E; CONF-940722--33; ON: DE95003496; IN: CDF/PUB/TOP/PUBLIC/2830
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
HADRON INTERACTIONS
MASS
PARTICLE PRODUCTION
PROPERTIES OF OTHER PARTICLES INCLUDING HYPOTHETICAL PARTICLES
PROTON-ANTIPROTON INTERACTIONS
TOP PARTICLES