Search for the Higgs Boson in Events with Missing Transverse Energy and <em>b</em> Quark Jets Produced in <em>pp</em> Collisions at s√=1.96  TeV

Limits are placed on the production cross section and the branching fraction for the Higgs boson decay into a photon pair and compared to the predictions of a benchmark

Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan;

Sources of systematic uncertainty in the background yield of tagged b jets include the uncertainty in the b -jet tagging efficiency in the data (a relative 6% uncertainty on all

Sloan Foundation; the Bundesministerium fu¨r Bildung und Forschung, Germany; the World Class University Program, the National Research Foundation of observed events in the signal

Assuming a top quark mass of 175  GeV/c2 and ascribing the excess to single top quark production, the cross section is measured to be 4.9+2.5−2.2(stat+syst)  pb, consistent

76 Department of Physics and Astronomy, University College London, London, United Kingdom. 77 Laboratoire de Physique Nucle´aire et de Hautes Energies, UPMC and

25 Center for High Energy Physics: Kyungpook National University, Daegu 702-701, Korea; Seoul National University, Seoul 151-742, Korea; Sungkyunkwan University, Suwon 440-746,

Also shown is the composition of the background expected from Monte Carlo simulation and the divi- sion of the observed data as discussed in the text as well as the ex- pected number