We present a search for the standard model Higgs boson production in association with a W boson in proton-anti proton collisions (pp arrow right W super(+ or -)H arrow right lnubb) at a center of ...mass energy of 1.96 TeV. The search employs data collected with the CDF II detector which correspond to an integrated luminosity of approximately 2.7 fb super(-1). We recorded this data with two kinds of triggers. The first kind required high-p sub()Tcharged leptons and the second required both missing transverse energy and jets. The search selects events consistent with a signature of a single lepton (e super(+ or -)/ mu super(+ or -)), missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method and a jet probability tagging method. Kinematic information is fed in an artificial neural network to improve discrimination between signal and background. The search finds that both the observed number of events and the neural network output distributions are consistent with the standard model background expectations, and sets 95% confidence level upper limits on the production cross section times branching ratio. The limits are expressed as a ratio to the standard model production rate. The limits range from 3.6 (4.3 expected) to 61.1 (43.2 expected) for Higgs masses from 100 to 150 GeV /c super(2), respectively.
Meteorology's Educational Dilemma Croft, Paul J; Binkley, Mark S
Bulletin of the American Meteorological Society,
06/1997, Letnik:
78, Številka:
6
Journal Article
Recenzirano
Meteorology has seen unparalleled growth and change during the past 50 years. Rapid advances in theory, applications, and technology have demanded constant revision and updating of basic meteorology ...course material. This continued growth and expansion of basic knowledge and applications requires that older materials be replaced with new, that depth be replaced by breadth, or that fundamental pedagogical changes be made in instruction and curricular content. These choices are symptomatic of meteorology's current and future educational dilemma: How do we adequately prepare future meteorologists for their careers as the wealth of meteorological information, theory, and applications change?
Answering this question requires a brief consideration of the history and effectiveness of undergraduate meteorological education. Perhaps more importantly, it points to the need for a consensus within the field as to what constitutes appropriate undergraduate meteorological preparation. Only then may possible solutions be outlined and their merits, cost-effectiveness, and efficacy reviewed. Based on this assessment, a plan of action can be developed to ensure the field's growth and its ability to produce viable meteorologists. Seven options are outlined in this paper as possible solutions to the dilemma. Of these, we believe that a revision of the pedagogy of meteorology with regard to curriculum requirements, course content, certification, and methods of instruction may be the most appropriate.
Correction on Psyllid-Yellows Binkley, A. M.
Science (American Association for the Advancement of Science),
07/1931, Letnik:
74, Številka:
1907
Journal Article
We report limits on anomalous ital ZZgamma and ital Zgammagamma couplings derived from an analysis of ital Z+photon production based upon approximately 20pbsup minus1 of the bar p collision data ...recorded by the Collider Detector at Fermilab. We observe good agreement with the standard model expectation that all ital Zgamma couplings are zero. Confidence level intervals for individual couplings and contours for pairs of ital CP-conserving/violating ital ZZgamma and ital Zgammagamma couplings are presented.
We report on a study of ital W+ photon production in approximately 20 pbsup minus1 of ital pminusital bar p collisions at radicalital s=1.8 TeV recorded with the Collider Detector at Fermilab. Our ...results are in good agreement with standard model expectations and are used to obtain limits on anomalous ital CP-conserving ital WWgamma couplings of minus2.3ltDeltakappalt2.2 for lambda=0 and minus0.7ltlambdalt0.7 for Deltakappa=0 at 95% C.L. We obtain the same limits for ital CP-violating couplings. These results provide limits on the higher-order electromagnetic moments of the ital W boson of 0.8ltital gsub ital Wlt3.1 for ital qsup ital esub ital W=1 and minus0.6ltital qsup ital esub ital Wlt2.7 for ital gsub ital W=2 at 95% C.L.
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![Limits on [ital Z]-photon c...](http://api.summon.serialssolutions.com/2.0.0/image/issn/XR4PS5YY4K/0031-9007/small "Limits on [ital Z]-photon couplings from [ital p]-[bar p] interactions at [radical][ital s]=1. 8TeV")