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We present a search for a Higgs boson decaying to two W bosons in pp̄ collisions at s=1.96TeV center-of-mass energy. The data sample corresponds to an integrated luminosity of 3.0fb-1 collected with the CDF II detector. We find no evidence for production of a Higgs boson with mass between 110 and 200GeV/c2, and determine upper limits on the production cross section. For the mass of 160GeV/c2, where the analysis is most sensitive, the observed (expected) limit is 0.7 pb (0.9 pb) at 95% Bayesian credibility level which is 1.7 (2.2) times the standard model cross section. © 2009 The American Physical Society.

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Physical Review Letters