Search for a Low-Mass Standard Model Higgs Boson in the TT Decay Channel in pp Collisions at s~(1/2) = 1.96 TeV

摘要

We report on a search for the standard model Higgs boson decaying into pairs of t leptons in pp collisions produced by the Tevatron s~(1/2) = 1.96 TeV. The analyzed data sample was recorded by the CDFII detector and corresponds to an integrated luminosity of 6.0 fb~(-1). The search is performed in the final state with one T decaying leptonically and the second one identified through its semihadronic decay. Since no significant excess is observed, a 95% credibility level upper limit on the production cross section times branching ratio to the tt final state is set for hypothetical Higgs boson masses between 100 and 150 Ge V/c~2. For a Higgs boson of 120 GeV/c~2 the observed (expected) limit is 14.6 (15.3) the predicted value.