Combined Search for the Standard Model Higgs Boson from the DØ Experiment in up
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چکیده
Searches for standard model Higgs boson production in p¯ p collisions at √ s = 1.96 TeV are carried out for Higgs boson masses (mH) in the range 100 ≤ mH ≤ 200 GeV/c 2. The contributing production processes include gluon-gluon fusion (gg →H), associated production (q ¯ q →V H) and vector boson fusion (q ¯ q →q ¯ qH). Analyses are conducted over an array of distinct final states with integrated luminosities ranging from 4.3 to 9.7 fb −1. We set limits on standard model Higgs boson production. The observed 95% Confidence Level upper limits are found to be a factor of 2.17 (0.94) times the predicted standard model cross section at mH = 115 (165) GeV/c 2 , while the expected limit is found to be a factor of 1.58 (0.76) times the standard model prediction for the same mass. We exclude at the 95% C.L. the region 159 < mH < 166 GeV/c 2 with an a priori expected exclusion of 157 < mH < 172 GeV/c 2. In the mass range ∼ 115 − 145 GeV/c 2 , the data exhibit an excess above the background prediction at the level of 1–2 Gaussian standard deviations.
منابع مشابه
Combined Upper Limits on Standard Model Higgs Boson Production in the W + W − , ττ and γγ decay modes in up to 8 . 2 fb − 1 of data from the DØ Experiment
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