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CDF evidence for the top quark & B physics at Fermilab

Description: We present the first direct evidence for the top quark with the Collider Detector at Fermilab (CDF) in a sample of {bar p}p collisions at {radical}s=1.8 TeV with an integrated luminosity of 19.3 pb{sup -1}. The recent B physics results at Fermilab from both collider and fixed target experiments are reviewed.
Date: February 1, 1997
Creator: Yao, Weiming
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Decays of the tau lepton

Description: Previous measurements of the branching fractions of the tau lepton result in a discrepancy between the inclusive branching fraction and the sum of the exclusive branching fractions to final states containing one charged particle. The sum of the exclusive branching fractions is significantly smaller than the inclusive branching fraction. In this analysis, the branching fractions for all the major decay modes are measured simultaneously with the sum of the branching fractions constrained to be on… more
Date: February 1, 1986
Creator: Burchat, P. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Detector problems at the SSC

Description: During the last couple of years there has been considerable concern expressed among the US high energy community as to whether detector limitations would prevent one from being able to fully exploit a luminosity of 10/sup 33/ cm/sup -2/ sec/sup -1/ at a hadron-hadron high energy collider. As a result of these concerns, a considerable amount of work has been done recently in trying to understand the nature of potential difficulties and the required R and D that needs to be performed. A lot of th… more
Date: February 1, 1985
Creator: Wojcicki, S.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of CRID (Cerenkov Ring Imaging Detector) single electron wire detector

Description: We describe the R and D effort to define the design parameters, method of construction and experimental results from the single electron wire detectors. These detectors will be used for particle identification using the Cerenkov Ring Imaging techniques in the SLD experiment at SLAC. We present measurements of pulse heights for several gases as a function of gas gain, charge division performance on a single electron signal using both 7 /mu/m and 33 /mu/m diameter carbon wires, photon feedback in… more
Date: February 1, 1989
Creator: Aston, D.; Bean, A.; Bienz, T.; Bird, F.; Caldwell, D.; Cavalli-Sforza, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of the OSO-6 high-energy neutron detector and correlation of measured solar neutron fluxes to solar flares

Description: Thesis. The development of a directional high energy (20 to 160 MeV) neutron detector which was flown to satellite altitudes (500 km; circular equatorial orbit) in the NASA Orbiting Solar Observatory (OSO-6) in August 1969 is described. Both the angle of incidence and the energy of the neutron are determined by a proton-recoil telescope (Pilot B scintillation plastic) which provides the source for proton-recoils and defines the dE/dX versus E method for particle identification and energy determ… more
Date: February 1, 1974
Creator: Young, F.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Evidence of K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}}: The BNL E787 1995 result (How did we get here)

Description: The kaon was studied very thoroughly since its discovery some 50 years ago. In the study of charged kaon branching ratios, it was noticed that K{sup +} {r_arrow} {pi}{sup 0}e{sup +}{nu}{sub e} is allowed while K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} is not. The latter was then empirically classified as a forbidden decay, leading to the so called strangeness changing current rule. The decay K{sup +} {r_arrow} {pi}{sup 0}e{sup +}{nu}{sub e} is mediated by the strangeness changing charged cu… more
Date: February 1, 1998
Creator: Chiang, I. H. & Collaboration, E787
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hadronic- and electromagnetic-cascade discrimination in a thin lead--argon calorimeter

Description: Calculations were carried out to determine methods or a combination of methods for discriminating between high-energy (approximately greater than 15 GeV) hadrons and leptons or photons incident on a thin lead-argon calorimeter. Some of the methods considered involve fluctuations in shower development, the centroid of the shower, and ratios of the pulse height obtained from various locations within the device. Of these, the latter appears the most promising.
Date: February 1, 1977
Creator: Jensen, T.; Amburgey, J. D. & Gabriel, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Physics at e sup + e sup minus factories

Description: Feasible designs are well advanced for high-luminosity e{sup +}e{sup {minus}} storage rings which produce B{sup 0}{bar B}{sup 0} pairs either at rest or, in what appears to be a more promising option, boosted in the detector frame. Facilities which could provide samples of 30--100 fb{sup {minus}1} per year on the {Upsilon}(4S) will be proposed in early 1991. Here we examine the principal physics goal of such B Factories, namely CP violation in the b system. Methods in a variety of channels, est… more
Date: February 1, 1991
Creator: Lueth, V. (Stanford Linear Accelerator Center, Menlo Park, CA (USA)) & MacFarlane, D.B. (McGill Univ., Montreal, PQ (Canada))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Report on 240Am(n,x) surrogate cross section test measurement

Description: The main goal of the test measurement was to determine the feasibility of the {sup 243}Am(p,t) reaction as a surrogate for {sup 240}Am(n,f). No data cross section data exists for neutron induced reactions on {sup 240}Am; the half-life of this isotope is only 2.1 days making direct measurements difficult, if not impossible. The 48-hour experiment was conducted using the STARS/LIBERACE experimental facility located at the 88 Inch Cyclotron at Lawrence Berkeley National Laboratory in August 2011. … more
Date: February 1, 2012
Creator: Ressler, J J; Burke, J T; Gostic, J; Bleuel, D; Escher, J E; Henderson, R A et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Search for Anomalous Production of Multiple Leptons in Association With $W$ and $Z$ Bosons at Cdf

Description: This paper presents a search for anomalous production of multiple low-energy leptons in association with a W or Z boson using events collected at the CDF experiment corresponding to 5.1 fb{sup -1} of integrated luminosity. This search is sensitive to a wide range of topologies with low-momentum leptons, including those with the leptons near one another. The observed rates of production of additional electrons and muons are compared with the standard model predictions. No indications of phenomen… more
Date: February 1, 2012
Creator: Aaltonen, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for exotic particles at CDF

Description: CDF has searched for 2nd generation leptoquarks, new gauge bosons W{prime} and Z{prime}, axigluons, excited quarks, color octet technirhos and E{sub 6} diquarks. We place the most stringent limits on direct production of these exotic particles.
Date: February 1, 1995
Creator: Harris, R.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for Neutrino Oscillations at the Brookhaven AGS

Description: We report on a search for neutrino oscillations of the type nu/sub ..mu../ ..-->.. nu/sub e/ in a detector located an effective distance of 96m from the neutrino source in the wide band neutrino beam at the Brookhaven AGS. No excess of electron events was observed. The resulting upper limit on the strength of the mixing between nu/sub ..mu../ and nu/sub e/ in the case of large mass difference ..delta..m/sup 2/ = absolute value m/sub 1//sup 2/ - m/sub 2//sup 2/ between the neutrino mass eigensta… more
Date: February 20, 1985
Creator: Ahrens, L. A.; Aronson, S. H.; Connolly, P. L.; Gibbard, B. G.; Murtagh, M. J.; Murtagh, S. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for the top quark in electron-muon events with CDF

Description: The CDF detector has collected data for an integrated luminosity of 4.4 pb{sup {minus}1} during the 1988--89 Tevatron Collider run. This sample has been used to search for the top quark. We report here the results of the analysis of the electron-muon topology. We find that a top mass in the 28 to 72 GeV is excluded at the 95% confidence level. The same limits apply to a possible fourth generation, charge {minus}1/3, b{prime} quark decaying via the charged current. 21 refs., 14 figs.
Date: February 1, 1990
Creator: Barbaro-Galtieri, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for third generation vector leptoquarks in 1.96 TeV proton-antiproton collisions

Description: The CDF experiment has searched for production of a third generation vector leptoquark (VLQ3) in the di-tau plus di-jet channel using 322 pb{sup -1} of Run II data. We review the production and decay theory and describe the VLQ3 model we have used as a benchmark. We study the analysis, including the data sample, triggers, particle identification, and event selection. We also discuss background estimates and systematic uncertainties. We have found no evidence for VLQ3 production and have set a 9… more
Date: February 1, 2007
Creator: Akimoto, Takashi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Status of the Fast Focusing DIRC (fDIRC)

Description: We have built and successfully tested a novel particle identification detector concept, the Fast Focusing DIRC (fDIRC). The prototype's concept is based on the BaBar DIRC with several important improvements: (a) much faster pixelated photon detectors based on Burle MCP-PMTs and Hamamatsu MaPMTs, (b) a focusing mirror allowing a smaller photon detector, reducing the sensitivity to backgrounds in future applications, (c) electronics capable of measuring the single photon resolution to better than… more
Date: February 4, 2008
Creator: Benitez, J.; Leith, D. W. G. S.; Mazaheri, G.; Ratcliff, B. N.; Schwiening, J.; Vavra, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The W boson transverse momentum spectrum in proton-antiproton collisions at radical s = 1. 8 TeV

Description: The Collider Detector at Fermilab (CDF) was used to measure the transverse momentum distribution of W boson produced in proton-antiproton collisions at the Tevatron collider. The W bosons were identified by the decay W {yields} e{nu}. The results are in good agreement with a next-to-leading order calculation. The cross section for W production with P{sub T} > 50 GeV/c is 423 {plus minus} 58 (stat.) {plus minus} 108 (sys.) pb. 58 refs., 53 figs., 16 tabs.
Date: February 1, 1991
Creator: Winer, B.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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