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Prospects for top at CDF

Description: During the next two years, the Fermilab Tavatron is expected to deliver approximately 100pb{sup {minus}1} of integrated luminosity. We describe improvements to the CDF detector since the 1988--89 collider run and discuss the prospects for the discovery of the top quark during the 1992--93 collider runs.
Date: June 3, 1992
Creator: Gerdes, D. (Chicago Univ., IL (United States))
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Partner: UNT Libraries Government Documents Department
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Tutorial on neural network applications in high energy physics: A 1992 perspective

Description: Feed forward and recurrent neural networks are introduced and related to standard data analysis tools. Tips are given on applications of neural nets to various areas of high energy physics. A review of applications within high energy physics and a summary of neural net hardware status are given.
Date: April 1, 1992
Creator: Denby, B.
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Partner: UNT Libraries Government Documents Department
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Search for W prime and Z prime at CDF

Description: We have searched for heavy charged and neutral vector bosons via the decays W{prime} {yields} ev, W{prime} {yields} {mu}v, Z{prime} {yields} {mu}{mu} in p{bar p} collisions at {radical}s = 1.8 TeV, using data taken with the collider Detector at Fermilab. The nonobservation of these processes leads to a lower limit (95% confidence level) of 520 GeV/c{sup 2} on the mass of the W{prime} and of 412 GeV/C{sup 2} on the mass of the Z{prime}, assuming standard model coupling to fermions. 12 refs., 6 f… more
Date: September 1, 1991
Creator: Fuess, T.
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Partner: UNT Libraries Government Documents Department
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Search for the. Lambda. sub b baryon at CDF

Description: The {Lambda}{sub b} baryon has been observed recently by UA1 through its decay {Lambda}{sub b} {yields} J/{psi}{Lambda}{degrees}. Although CDF finds twice as many J/{psi} and observes {Lambda}{degrees} decays, no evidence for an {Lambda}{sub b} signal is seen. The UA1 data supports a lower than expected production P{sub T} for the {Lambda}{sub b}, and therefore, a lower pion P{sub T}, below the observation threshold of CDF. This result suggests that UA1 and CDF are probably not inconsistent, bu… more
Date: April 1, 1992
Creator: Gauthier, A. (Illinois Univ., Urbana, IL (United States))
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Partner: UNT Libraries Government Documents Department
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(Search for strange quark matter and antimatter produced in high energy heavy ion collisions)

Description: This document describes the development and progress of our group's research program in high energy heavy ion physics. We are a subset of the Yale experimental high energy physics effort (YAUG group) who became interested in the physics of high energy heavy ions in 1988. Our interest began with the possibility of performing significant searches for strange quark matter. As we learned more about the subject and as we gained experimental experience through our participation in AGS experiment 814,… more
Date: January 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Is there a P-wave bound state of W sub L W sub L On the dynamical generation of a. rho. meson in the. sigma. model

Description: We investigate the possibility that the Higgs lagrangian predicts the existence of a P-wave W{sub L}W{sub L} resonance. This problem is equivalent to studying the formation of the {rho} meson by the dynamics contained in the {sigma} model. Using the Pade approximation, Basdevant and Lee had claimed that {rho} is generated dynamically. We show that their result, while computationally correct, is not significant, because of the position of the Landau ghost. For the same reason, a W{sub L}W{sub L}… more
Date: October 1, 1991
Creator: Atkinson, D. (Fermi National Accelerator Lab., Batavia, IL (United States) Institute for Theoretical Physics, Groningen, The Netherlands (NL)); Harada, M. (Nagoya Univ. (Japan). Dept. of Physics) & Sanda, A.I. (Superconducting Super Collider Lab., Dallas, TX (United States) Rockefeller Univ., New York, NY (United States). Dept. of Physics)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Update to the RHIC Letter of Intent for an experiment on particle and jet production at midrapidity

Description: This document is an Update to the Letter of Intent (LOI) submitted by this collaboration in September 1990 proposing a large acceptance solenoidal tracking experiment. Since that time the collaboration has chosen the name STAR, representing Solenoidal Tracker At RHIC. The physics interests of the STAR collaboration and the goals of the experiment are described in the original LOI. Since submission of the LOI, several changes have been made in the design of the experiment motivated by the desire… more
Date: July 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Particle identification at an asymmetric B Factory

Description: Particle identification systems are an important component of any detector at a high-luminosity, asymmetric B Factory. In particular, excellent hadron identification is required to probe CP violation in B{sup 0} decays to CP eigenstates. The particle identification systems discussed below also provide help in separating leptons from hadrons at low momenta. We begin this chapter with a discussion of the physics motivation for providing particle identification, the inherent limitations due to int… more
Date: September 1, 1991
Creator: Coyle, P.; Eigen, G.; Hitlin, D.; Oddone, P.; Ratcliff, B.; Roe, N. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Non-accelerator particle physics

Description: The goals of this research are the experimental testing of fundamental theories of physics such as grand unification and the exploration of cosmic phenomena through the techniques of particle physics. We are working on the MACRO experiment, which employs a large area underground detector to search for grand unification magnetic monopoles and dark matter candidates and to study cosmic ray muons as well as low and high energy neutrinos: the {nu}IMB project, which seeks to refurbish and upgrade th… more
Date: September 1, 1991
Creator: Steinberg, R.I. & Lane, C.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Search for the H-Dibaryon at the Brookhaven 2 GeV/c Kaon Beam Line

Description: In this talk I will summarize the motivation for H-dibaryon searches and describe efforts at Brookhaven to find this particle. The most recently run experiment, using a new 2 GeV/c kaon beam line, has looked for the H in the at-rest formation reaction ({Xi}{sup {minus}} + d){sub atom} {r arrow} H + n, where the monoenergetic neutron was detected. This experiment is sensitive to an H in the range near the {Lambda}{Lambda} mass, a region largely unconstrained by other measurements. Data analysis … more
Date: January 1, 1991
Creator: Schumacher, Reinhard A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The search for top at CDF

Description: We present results on the search for the top quark in {bar p}p collisions at {radical}s = 1.8 TeV. The data sample collected during the 1988--89 run with the Collider Detector at Fermilab (CDF) includes more than 4 pb{sup {minus}1}. We report here on an extension of previously published searches for the top quark in electron + jets and the dilepton channel electron-muon. The 95% confidence level limit on the top mass is 89 GeV/c{sup 2}.
Date: August 1, 1991
Creator: Liss, T.M. (Illinois Univ., Urbana, IL (United States). Loomis Lab. of Physics)
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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Evidence for. rho. sub 1 (1600) from the decay J/. psi. yields. pi. sup minus. pi. sup +. pi. sup 0

Description: Data from MARK 3 on the decay J/{psi} {yields} {pi}{sup {minus}}{pi}{sup +}{pi}{sup 0} are described in terms of amplitudes representing the sequential two-body decay processes J/{psi} {yields} {rho}{pi}, {rho}{yields}{pi}{pi}. It is found that a complete description requires contributions from excited J{sup PC} = 1{sup --} states in addition to the dominant contribution form the {rho}(770). The characteristics of these additional states are discussed. 11 refs., 6 figs.
Date: October 1, 1991
Creator: Chen, Liang-Ping (Vanderbilt Univ., Nashville, TN (United States)) & Dunwoodie, W. (Stanford Linear Accelerator Center, Menlo Park, CA (United States))
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Partner: UNT Libraries Government Documents Department
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Experimental investigation of the production of glueballs and meson resonance states

Description: We have made striking and considerable progress in our AGS program which is searching for a Quark-Gluon Plasma or other new phenomena at the AGS. We are employing a TCP Tracking Magnetic Spectrometer that has handled up to {approx}100 tracks, the maximum observed in 14.5 GeV/c {times} A Si ions incident on Au and Cu. In essence the TPC covers more than the forward half hemisphere in the nucleon-nucleon cms (i.e. {ge} 2{pi}) and thus allows tracking, momentum and angular analysis of the charged … more
Date: December 19, 1990
Creator: Lindenbaum, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Top search at CDF

Description: We review top quark searches carried out at CDF with data collected during the 1988--1989 Collider Run. The latest analyses give a lower limit on the top quark mass of 91 GeV/c{sup 2} at the 95% confidence level, assuming Standard Model decays. 8 refs., 6 figs., 1 tab.
Date: October 1, 1991
Creator: Contreras, M. (Chicago Univ., IL (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hunting and identifying new gauge bosons at the NLC

Description: We examine the ability of the NLC ({radical}{bar s} = 500 GeV) e{sup +}e{sup {minus}} linear collider to discover and identify the origin of new neutral gauge bosons, with masses in excess of the machine's center of mass energy, via deviations from the predictions of the Standard Model for the process e{sup +}e{sup {minus}} {yields} {bar f}f. New gauge bosons with masses in the few TeV regime may be probed at such at collider. 7 refs., 3 figs., 2 tabs.
Date: October 1, 1991
Creator: Hewett, J. L. & Rizzo, T. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Direct production of high p sub t leptons and search for additional heavy bosons at 1. 8 TeV

Description: We have studied the production of high p{sub t} electrons and muons and searched for additional heavy charged (W{prime}) and neutral (Z{prime}) vector bosons. We find no evidence for such bosons and set limits of M{sub w}{prime} > 520 GeV and M{sub Z}{prime} > 412 GeV (95% confidence level) assuming Standard Model couplings. The production of high mass electron and muon pairs is consistent with the Standard Model prediction for the Drell-Yan production mechanism. Lower limits of 2.2 TeV and 1.6… more
Date: October 1, 1991
Creator: Gold, M. (Lawrence Berkeley Lab., CA (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron identification and implications in SSC detector design

Description: In the context of Heavy Higgs searches in the decay mode H {yields} ZZ {yields} 4e, electron identification issues and their implications on detector design are discussed (though many of the issues are valid for muon modes as well). The backgrounds considered seem manageable (a net rejection of 100 for combined electron ID and isolation cut is needed and seems fairly straightforward). A detector must have wide electron rapidity coverage {eta} < 2.5 to 3 and the ability to identify and measure a… more
Date: May 1, 1990
Creator: Bensinger, J. (Brandeis Univ., Waltham, MA (USA) Superconducting Super Collider Lab., Dallas, TX (USA)); Wang, E.M. (Lawrence Berkeley Lab., CA (USA)) & Yamamoto, H. (California Univ., Los Angeles, CA (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Search for the top quark and other new particles at D0

Description: Preliminary results from the search for the top quark and other new particles in p[bar p] collisions at [radical]s = 1.8 TeV are reported. In a data sample corresponding to an integrated luminosity of about 7.5 pb[sup [minus]1], one candidate event for top quark is found in the di-lepton channel. A lower limit for the mass of the top quark of 103 GeV/c[sup 2] (99 Gev/c[sup 2]) is obtained at 95% confidence level with (without) background subtraction. Status of searches for other new particles t… more
Date: September 1, 1993
Creator: Bhat, P.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proposal for a CLEO Precision Vertex Detector

Description: Fermilab experiment E691 and CERN experiment NA32 have demonstrated the enormous power of precision vertexing for studying heavy quark physics. Nearly all collider experiments now have or are installing precision vertex detectors. This is a proposal for a precision vertex detector for CLEO, which will be the pre-eminent heavy quark experiment for at least the next 5 years. The purpose of a precision vertex detector for CLEO is to enhance the capabilities for isolating B, charm, and tau decays a… more
Date: January 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Search for the H particle: Its production and weak decay

Description: Jaffe has suggested that a six-quark state with the flavor content of two-lambda hyperons with all spins coupled to zero, the H particle, may be bound against strong decay. This particle has become the object of extensive discussion in the literature and of several experimental searches. We report here the present status of an investigation of the reaction: ({Xi}{minus},d){sub atom}{yields} H + n in experiment E-813 at the BNL-AGS and describe plans for future running in 1992.
Date: January 1, 1991
Creator: Barnes, P.D.
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Partner: UNT Libraries Government Documents Department
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(Relativistic heavy ion research)

Description: At Brookhaven National Laboratory, participation in the E802 Experiment, which is the first major heavy-ion experiment at the BNL-AGS, was the main focus of the group during the past four years. The emphases of the E802 experiment were on (a) accurate particle identification and measurements of spectra over a wide kinematical domain (5{degree} < {theta}{sub LAB} < 55{degree}, p < 20 GeV/c); and (b) measurements of small-angle two-particle correlations, with event characterization tools: multipl… more
Date: January 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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