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Search for the Higgs boson produced in association with Z -> l(+)l(-) using the matrix element method at CDF II

AuthorsCDF Collaboration; Cabrera, Susana ; Cuenca Almenar, Cristóbal ; Álvarez González, B.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Aaltonen, T.
Issue Date12-Oct-2009
PublisherAmerican Physical Society
CitationPhysical Review - Section D - Particles and Fields 80 (7): 071101(2009)
AbstractWe present a search for associated production of the standard model Higgs boson and a Z boson where the Z boson decays to two leptons and the Higgs decays to a pair of b quarks in p (p) over bar collisions at the Fermilab Tevatron. We use event probabilities based on standard model matrix elements to construct a likelihood function of the Higgs content of the data sample. In a CDF data sample corresponding to an integrated luminosity of 2: 7 fb(-1) we see no evidence of a Higgs boson with a mass between 100 GeV=c(2) and 150 GeV/c(2). We set 95% confidence level upper limits on the cross section for ZH production as a function of the Higgs boson mass m(H); the limit is 8.2 times the standard model prediction at m(H) 115 GeV/c(2).
Publisher version (URL)http://dx.doi.org/ 10.1103/PhysRevD.80.071101
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