WorldCat Identities

Lai, Stanley T.

Works: 1 works in 1 publications in 1 language and 5 library holdings
Roles: Author
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Most widely held works by Stanley T Lai
Search for standard model Higgs boson produced in association with a top-antitop quark pair in 1.96 TeV proton-antiproton collisions by Stanley T Lai( )

1 edition published in 2007 in English and held by 5 WorldCat member libraries worldwide

This thesis describes the first search for Standard Model Higgs boson production in association with a top-antitop quark pair in proton-antiproton collisions at a centre of mass energy of 1.96 TeV. The integrated luminosity for this search corresponds to 319 pb-1 of data recorded by the Collider Detector at Fermilab. We outline the event selection criteria, evaluate the event acceptance and estimate backgrounds from Standard Model sources. Three events are observed that satisfy our event selection, while 2.16 +/- 0.66 events are expected from background processes. No significant excess of events above background is thus observed, and we set 95% confidence level upper limits on the production cross section for this process as a function of the Higgs mass. For a Higgs boson mass of 115 GeV/ c2, we find that sigmatt H x BR(H b b) < 690 fb at 95% C.L. These are the first limits set for ttH production. This search also allows us to anticipate the challenges and necessary strategies needed for future searches of ttH production
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