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T,b, and new particle searches at p p colliders

Description: Experiments at the p{bar p} colliders at CERN and FNAL have an active program of heavy flavor physics. Recently, CDF at FNAL and UA1 at CERN have measured rare decays of the {Beta}{sup 0} {minus} {bar {Beta}}{sup 0} mixing. CDF has signals for {Beta}{sup {plus minus}} {yields} J/{psi}K{sup {plus minus}} and {Beta}{sup 0} {yields} J/{psi}K{sup *0}. Both CDF and UA1 have set limits on the branching ratio of {Beta}{sup 0} {yields} {mu}{sup +}{mu}{sup {minus}} and have measured {Beta}{sup 0} {minus… more
Date: August 1, 1991
Creator: Crane, D.A.
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Partner: UNT Libraries Government Documents Department
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A measurement of the p p total cross section at radical s = 1800 GeV

Description: The {bar p}p differential elastic scattering cross section was measured at {radical}{bar s} = 1800 GeV, using an improved accelerator luminosity determination and CDF small angle data in the range of 0.05 {le} t {le} 0.2(GeV/c){sup 2}. By extrapolating the differential cross sections to t=0 and using the optical theorem we obtain a total cross section of {sigma}{sub tot}({bar p}p) = 72.0 {plus minus} 3.6 mb. This result is preliminary in the sense that we expect to further reduce the systematic… more
Date: October 1, 1991
Creator: White, S. (Rockefeller Univ., New York, NY (United States))
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Partner: UNT Libraries Government Documents Department
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Heavy flavor physics at hadron colliders

Description: The search for the top quark has dominated heavy flavor physics at hadron colliders. For Standard model decay of top the present mass limit in m{sub t} > 89 GeV (95% C.L.). Bottom production cross sections are quite large at hadron colliders, thus providing enough statistics for extensive studies. Results on cross sections, B{sup 0} {minus} {bar B}{sup 0} mixing, exclusive channels and rare B decays will be summarized.
Date: December 1, 1991
Creator: Barbaro-Galtieri, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Isolated single and double direct photon production at CDF

Description: We present measurements of isolated direct phonon production in {bar p}p collisions at {radical}s = 1.18 TeV from the 1988--89 run of the Collider Detection at Fermilab (CDF). Quantum Chromodynamics is tested against measurements of the transverse momentum spectrum of single photon production ({bar p}p {yields} {gamma} + X), double photon production ({bar p}p {yields} {gamma}{gamma} + X), and the distribution of cos{theta} * in photon-jet events ({bar p}p {yields} {gamma}{sub J} + X). We also p… more
Date: September 1, 1991
Creator: Harris, R.
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Partner: UNT Libraries Government Documents Department
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Measurement of p p elastic scattering parameters at radical s = 1. 8 TeV

Description: A measurement of the total nuclear cross section, {sigma}{sub t}, the ratio of the real to the imaginary part of the forward nuclear elastic scattering amplitude, {rho}, and the nuclear slope parameter, B, for {bar p}p elastic scattering at {radical}{bar S} = 1.8 Te V, is presented. We find {sigma}{sub t} = 72.8 {plus minus} 3.1 mb, {rho} = 0.140 {plus minus} 0.69 and B = 16.99 {plus minus}.47 (GeV/c){sup {minus}2}. 5 refs., 13 figs., 2 tabs.
Date: August 1, 1991
Creator: Shukla, S.
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Partner: UNT Libraries Government Documents Department
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(Theoretical Nuclear Physics)

Description: This report discussed the following topics: Consistent RHA-RPA for finite nuclei; vacuum polarization in a finite system; isovector correlations in QHD description of nuclear matter; nuclear response functions in quasielastic electron scattering; charge density differences for nuclei near {sup 208}Pb in quantum hadro-dynamics; excitation of the 10.957 MeV 0{sup {minus}}; T=0 state in {sup 16}O by 400 MeV protons; deformed chiral nucleons; new basis for exact vacuum calculations in 3-spatial dim… more
Date: January 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement of. rho. , the ratio of the real to imaginary part of the p p forward elastic scattering amplitude, at radical s = 1. 8 TeV

Description: We have measured {rho}, the ratio of the real to the imaginary part of {bar p}p forward elastic scattering amplitude, at {radical}s = 1.8 TeV. Our result, {rho} = 0.140 {plus minus} 0.069, is consistent with the expected value, and thus no new physics is required. 10 refs., 2 figs.
Date: August 1, 1991
Creator: Rubinstein, R.
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Partner: UNT Libraries Government Documents Department
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Prospects for electroweak parameter measurements at CDF

Description: The 4 pb{sup {minus}1} of 1.8 TeV {bar p}p collisions accumulated by the collider Detector at Fermilab (CDF) have allowed various measurements of electroweak parameters. Three years from now results should be forthcoming on a sample of about 80 pb{sup {minus}1} which, in the likely context of that time, will still be quite significant.
Date: January 1, 1991
Creator: Nodulman, L.
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Partner: UNT Libraries Government Documents Department
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Mini-jet and particle production in ultra-relativistic heavy ion collisions

Description: Mini-jet and particle production are studied in the framework of HIJING Monte Carlo model which can describe pp and p{bar p} collisions well from ISR to Fermilab Tevatron energies. Mini-jets are shown to have eminent contributions to particle production in ultra-relativistic heavy ion collisions. However, parton shadowing and jet quenching also have important effects and can be studied by single particle distributions. 19 refs., 5 figs.
Date: July 1, 1991
Creator: Wang, Xin-Nian.
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Partner: UNT Libraries Government Documents Department
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Prospects for tunes near the integer at the Fermilab PBAR-P Collider

Description: A series of experiments with the Tevatron collider has been made which has a goal the operation of the machine with betatron tunes near 19.05. Experiments near the integer working point are described, including closed orbit control, and emittance growth due to power supply noise. Results from a pbar-p store with large pbar tunes shifts and tunes near the integer are described. 4 refs., 3 figs.
Date: May 1, 1991
Creator: Siergiej, D.; Ankenbrandt, C.; Finley, D.; Goderre, G.; Johnson, R. P. & Zhang, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Results from p p colliders

Description: Recent results {bar p}p colliders are presented. From elastic scattering experiments at the Tevatron, an average value of {sigma}{sub tot} = 72.1{plus minus}2 mb is reported, along with a new measurement of {rho} = 0.13 {plus minus} 0.7. New measurements of jet direct photon and high p{sub t} W and Z production are compared to more precise, higher order predictions from perturbative QCD. Recently available data on the W mass and width give combined values for M{sub W} = 80.14{plus minus}0.27 Ge… more
Date: August 1, 1991
Creator: Huth, J.
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Partner: UNT Libraries Government Documents Department
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Jets in CDF

Description: In the 1988/89 Tevatron Collider run the CDF experiment collected 4.0 {plus minus} 0.3 pb{sup {minus}1} of proton-antiproton interactions at a center-of-mass collision energy currently available in the laboratory and gives us a unique opportunity for studying Quantum Chromodymanics (QCD) processes at the highest available energies. We report results from various QCD studies performed with this data. 11 refs., 8 figs.
Date: July 1, 1991
Creator: Buckley-Geer, E. (Rutgers--the State Univ., New Brunswick, NJ (United States))
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)
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Partner: UNT Libraries Government Documents Department
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Tune modulated beam-beam resonances in the Tevatron

Description: During the 88--89 Tevatron collider run, 6 antiproton bunches were colliding head-on with 6 proton bunches at 12 crossing points symetrically distributed around the ring. Typical intensities were 7 {times} 10{sup 10} and 2.5 {times} 10{sup 10} particles per bunch for protons and antiprotons respectively. The normalized transverse proton emittance (95% definition) was typically 25 {pi} mm-mr on both planes and the antiproton transverse emittance was typically 18 {pi} mm-mr. The working point (un… more
Date: May 1, 1991
Creator: Saritepe, S. & Peggs, S.
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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The odderon versus a new threshold

Description: We show that a new threshold model with a threshold close to but below the UA4 energy is compatible with all forward elastic scattering data at high energies including the widely known UA4 measurement of the forward real part of the elastic p{bar p} scattering amplitude and the recent Fermilab Tevatron Collider experiments of the p{bar p} total cross-section. 14 refs.
Date: October 1, 1991
Creator: Kang, K. & White, A. R.
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Partner: UNT Libraries Government Documents Department
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QCD results from CDF

Description: Results are presented for hadronic jet and direct photon production at {radical}{bar s} = 1800 GeV. The data are compared with next-to-leading QCD calculations. A new limit on the scale of possible composite structure of the quarks is also reported. 12 refs., 4 figs.
Date: October 1, 1991
Creator: Plunkett, R.
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Partner: UNT Libraries Government Documents Department
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The physics of proton antiproton collisions

Description: This paper contains information information on: accelerator and detector; QCD studies; studies of the electroweak force; The search for the top quark; {beta} physics at hadron colliders; and the search for exotic objects and prospects for the future.
Date: December 3, 1991
Creator: Shochet, M. (Chicago Univ., IL (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Calculations of bottom quark production at hadron colliders

Description: This thesis studies Monte Carlo simulations of QCD heavy flavor production processes (p{bar p} {yields} Q({anti Q})X) at hadron colliders. ISAJET bottom quark cross-sections are compared to the O({alpha} {sub s}{sup 3}) perturbative calculation of Nason, Dawson, and Ellis. These Monte Carlo cross-sections are computed from data samples which use different parton distribution functions and physics parameters. Distributions are presented in the heavy quark's transverse momentum and rapidity. Corr… more
Date: June 29, 1991
Creator: Kuebel, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Energy and energy width measurement in the FNAL antiproton accumulator

Description: The Fermilab Antiproton Accumulator has recently been used to produce Charmonium resonances (charm quark, anti-charm quark bound states) in proton-antiproton annihilations using an internal H{sub 2} gas jet target. A measurement of the resonance mass and width may be obtained from a precise knowledge of the antiproton beam energy and energy spread. The beam energy is measured to an accuracy of 1 part in 10{sup 4} in the range 6.3 Gev to 4.1 Gev by measuring the orbit length and revolution frequ… more
Date: October 1, 1991
Creator: Church, M.; Hsueh, S.; Rapidis, P. & Werkema, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The search for the deconfined quark-gluon phase transition using 2 TeV p p collisions; The search for critical phenomena in multifragmentation using 1 GeV/nucleon heavy ion collisions; The development of the solenoidal detector (STAR) for the Relativistic Heavy Ion Collider (RHIC)

Description: This report discusses: Fermilab experiment 735, a search for the Quark-Gluon plasma; an exclusive study of nuclear fragmentation using the EOS-TPC; and, solenoidal tracker at RHIC.
Date: September 15, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Review of total cross sections and forward scattering parameters at ultra-high energies

Description: We review the field of the elastic scattering of pp and {bar p}p at the ultra-high energies. The recent total cross section, {sigma}{sub tot}, and {rho}-value results from the Fermilab Tevatron Collider experiments presented at the 4th Blois' Workshop on Elastic and Diffractive Scattering (Elba, Italy, in May, 1991), allow us a comprehensive overview of the field. 24 refs., 10 figs., 3 tabs.
Date: October 1, 1991
Creator: Block, M.M. (Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy) & White, A.R. (Argonne National Lab., IL (United States). High Energy Physics Div.)
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Partner: UNT Libraries Government Documents Department
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Results from E735 at the Tevatron proton-antiproton collider with radical s = 1. 8 TeV

Description: Experiment E735{dagger} searched for evidence of the transition to quark-gluon plasma in p{bar p} collisions at {radical}{bar s} = 1.8 TeV. Using data from a high statistics run in 1988--1989, results are presented on multiplicity distributions, hyperon and phi production, and Bose-Einstein correlations. Some data was also taken at lower collision energies and results will be compared to previous experiments.
Date: November 1, 1991
Creator: Lindsey, C.
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Partner: UNT Libraries Government Documents Department
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