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Electro-Weak, QCD and top physics at the Tevatron

Description: The 1992--1993 Tevatron collider run ended yesterday. {approx}21 (16)pb{sup {minus}1} of p{bar p} collisions at {radical}S = 1800 GeV were collected at CDF (D0). New measurements of the W and Z cross section x branching ratios indicate that {Gamma}(W) is 2.033 {plus_minus} 0.069 {plus_minus} 0.057 GeV. The upper limit for the top quark mass, if it is produced in W decays, is 62 GeV/c{sup 3}. Gauge boson pair production studies are beginning to constrain electro-weak parameters. No neutral gauge… more
Date: September 1, 1993
Creator: Diehl, H. T.
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Partner: UNT Libraries Government Documents Department
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Vector boson pair production and trilinear gauge boson couplings - Results from the Tevatron

Description: Direct measurements of vector boson pair production processes and trilinear gauge boson couplings have been conducted by the CDF and D0 Collaborations. Preliminary results from searches for anomalous WW/WZ {yields} {mu}{nu} jet jet and WZ {yields} eee{nu} production are presented. 95% CL anomalous coupling limits from previously published D0 results are -0.20< {lambda} < 0.20 ({Delta}{kappa} = 0) and -3.0<{Delta}{kappa} < 0:43 ({lambda} = 0) for {Lambda} = 2000 GeV where the WW{gamma} couplings… more
Date: October 1, 1998
Creator: Diehl, H. T.
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Partner: UNT Libraries Government Documents Department
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Search for anomalous couplings in WW and WZ measurements at the Tevatron (D0 and CDF results)

Description: The search for WW and WZ production in p{anti p} collisions at {radical}s = 1.8 TeV using the CDF and D0 detectors is presented. Three analyses, one concentrating on the leptons + jets decay channels and two concentrating on the dilepton decay channels are described in detail. Limits on anomalous WW{gamma} and WWZ trilinear gauge boson couplings are presented. Prospects for further study of diboson production and anomalous couplings with the Upgraded Tevatron are also presented.
Date: June 1, 1995
Creator: Diehl, H. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Boson pair production and triple gauge couplings

Description: The D0 and CDF Collaborations measure boson pair production including W{gamma}, WW, WZ, ZZ and Z{gamma} production in p{anti p} collisions at {radical}s = 1800 GeV. New results, from direct measurements, are described including W{gamma}, WW, and Z{gamma} production cross sections and limits on non-Standard Model triple gauge boson couplings. The limits on anomalous WW{gamma}, WWZ, Z{gamma}{gamma} and ZZ{gamma} couplings are the most restrictive available. Prospects for Run II are discussed.
Date: June 1, 1997
Creator: Diehl, H.T. & Collaborations, D0 and CDF
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Partner: UNT Libraries Government Documents Department
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Measurements of charge diffusion in deep-depletion CCDs by optical diffraction

Description: The charge diffusion is measured in back illuminated, fully depleted, 250 {micro}m thick CCDs by imaging the diffraction pattern of a double slit. The CCDs studied are the focal plane detectors for the Dark Energy Camera (DECam) instrument currently under construction for the Dark Energy Survey (DES). The results presented here indicate that the dispersion of charge due to diffusion can be kept below the DES specification ({sigma}{sub d} &lt; 7.0 {micro}m).
Date: October 1, 2007
Creator: Cease, H.; Diehl, H. T.; Estrada, J.; Flaugher, B. & Scarpine, V.
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Partner: UNT Libraries Government Documents Department
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Microsecond delays on non-real time operating systems

Description: We have developed microsecond timing and profiling software that runs on standard Windows and Linux based operating systems. This software is orders of magnitudes better than most of the standard native functions in wide use. Our software libraries calibrate RDTSC in microseconds or seconds to provide two different types of delays: a ''Guaranteed Minimum'' and a precision ''Long Delay'', which releases to the kernel. Both return profiling information of the actual delay.
Date: May 1, 2007
Creator: Angstadt, R.; Estrada, J.; Diehl, H. T.; Flaugher, B. & Johnson, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cooling the dark energy camera instrument

Description: DECam, camera for the Dark Energy Survey (DES), is undergoing general design and component testing. For an overview see DePoy, et al in these proceedings. For a description of the imager, see Cease, et al in these proceedings. The CCD instrument will be mounted at the prime focus of the CTIO Blanco 4m telescope. The instrument temperature will be 173K with a heat load of 113W. In similar applications, cooling CCD instruments at the prime focus has been accomplished by three general methods. Liq… more
Date: June 1, 2008
Creator: Schmitt, R. L.; Cease, H.; /Fermilab; DePoy, D.; U., /Ohio State; Diehl, H. T. et al.
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Partner: UNT Libraries Government Documents Department
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The Dark Energy Survey CCD imager design

Description: The Dark Energy Survey is planning to use a 3 sq. deg. camera that houses a {approx} 0.5m diameter focal plane of 62 2kx4k CCDs. The camera vessel including the optical window cell, focal plate, focal plate mounts, cooling system and thermal controls is described. As part of the development of the mechanical and cooling design, a full scale prototype camera vessel has been constructed and is now being used for multi-CCD readout tests. Results from this prototype camera are described.
Date: June 1, 2008
Creator: Cease, H.; DePoy, D.; Diehl, H. T.; Estrada, J.; Flaugher, B.; Guarino, V. et al.
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Partner: UNT Libraries Government Documents Department
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Commissioning and Initial Performance of the Dark Energy Camera Liquid Nitrogen Cooling System

Description: The Dark Energy Camera and its cooling system has been shipped to Cerro Tololo Inter-American Observatory in Chile for installation onto the Blanco 4m telescope. Along with the camera, the cooling system has been installed in the Coudé room at the Blanco Telescope. Final installation of the cooling system and operations on the telescope is planned for the middle of 2012. Initial commissioning experiences and cooling system performance is described.
Date: June 1, 2012
Creator: Cease, H.; Derylo, G.; Diehl, H. T.; Estrada, J.; Flaugher, B.; Kuk, K. et al.
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Partner: UNT Libraries Government Documents Department
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The VME-based D0 muon trigger electronics

Description: The trigger electronics for the muon system of the Fermilab D0 detector is described. The hardware trigger consists of VME-based cards designed to find probable tracks in individual chambers and then match these track segments. The fast trigger is highly parallel and able to discern probable tracks from about 15,000 trigger cells in under 200 ns from receipt of all bits in the counting house. There is a parallel confirmation trigger with a response time of 1--5 microseconds that provides a crud… more
Date: November 1, 1990
Creator: Fortner, M.; Green, J.; Hedin, D.; Morphis, R.; Repond, S.; Willis, S. et al.
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Partner: UNT Libraries Government Documents Department
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The Muon system of the run II D0 detector

Description: The authors describe the design, construction and performance of the upgraded D0 muon system for Run II of the Fermilab Tevatron collider. Significant improvements have been made to the major subsystems of the D0 muon detector: trigger scintillation counters, tracking detectors, and electronics. The Run II central muon detector has a new scintillation counter system inside the iron toroid and an improved scintillation counter system outside the iron toroid. In the forward region, new scintillat… more
Date: March 1, 2005
Creator: Abazov, V. M.; Acharya, B. S.; Alexeev, G. D.; Alkhazov, G.; Anosov, V. A.; Baldin, B. et al.
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Partner: UNT Libraries Government Documents Department
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