SEARCH FOR THE TOP-QUARK IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEVстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We have searched for evidence of top quark production in ppBAR collisions at square-root s = 1.8 TeV using the DO detector at the Fermilab Tevatron collider. For an integrated luminosity of 15 pb-1, we report results of a search for ttBAR pairs in the decay modes ttBAR --> emu + jets, ee + jets, e + jets, and mu + jets. From analyses of these modes we obtain a lower limit on the top quark mass of 131 GeV/c2 at the 95% confidence level, assuming standard model branching fractions and a predicted cross section for ttBAR production. We discuss the properties of an event for which expected backgrounds are small.