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Final Technical Report, Outstanding Junior Investigator Award for De-fg02-94er40869

Description: This report summarizes the research of the Principal Investigator, his postdoctoral research associates, and his students during the period of the award. The majority of the work concerns the behavior of hadrons containing strange, charm, bottom and top quarks, with a particular focus on the extraction of Cabibbo--Kobayashi--Maskawa matrix elements from experiments performed on such systems.
Date: May 16, 2002
Creator: Falk, Adam F.
Partner: UNT Libraries Government Documents Department
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Development of a Charged Particle Microbeam for Targeted and Single Particle Subcellular Irradiation

Description: The development of a charged particle microbeam for single particle, subcellular irradiations at the Massachusetts Institute of Technology Laboratory for Accelerator Beam Applications (MIT LABA) was initiated under this NEER aeard. The Microbeam apparatus makes use of a pre-existing electrostatic accelerator with a horizontal beam tube.
Date: March 12, 2004
Creator: Yanch, Jacquelyn C.
Partner: UNT Libraries Government Documents Department
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Hyperon weak radiative decays and magnetic moments

Description: We have measured the branching ratio and asymmetry parameter in the hyperon radiative decays {Sigma}{sup +} {sup {yields}} p{gamma} and {Xi}{sup {minus}} {sup {yields}} {Sigma}{sup {minus}} {gamma} with samples of 34754{plus_minus}212 and 211{plus_minus}33 events respectively decay {Omega}{sup {minus}} {yields} {Xi}{sup {minus}} {gamma} and made a precision measurement of the magnetic moments of the {Sigma}{sup +} and a first measurement of the magnetic moment of the anti({Sigma}{sup +}). These… more
Date: December 23, 1993
Creator: Cooper, P. S. & Collaboration, E761
Partner: UNT Libraries Government Documents Department
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Task J: Outstanding Junior Investigator (OJI). Technical progress report, [November 1, 1993--October 31, 1993]

Description: We report on an existing program of research on the production and decay of particles containing the charm and beauty quarks. Charm is studied in Fermilab fixed target experiments E769 and E691. Design and development for a hadron collider beauty experiment is studied in CERN test experiment P238 and in simulation studies for the SSC.
Date: July 6, 1993
Creator: Karchin, P. E.
Partner: UNT Libraries Government Documents Department
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Guiding Center Equations of High Accuracy

Description: Guiding center simulations are an important means of predicting the effect of resistive and ideal magnetohydrodynamic instabilities on particle distributions in toroidal magnetically confined thermonuclear fusion research devices. Because saturated instabilities typically have amplitudes of δ#14;B/B of a few times 10-4 numerical accuracy is of concern in discovering the effect of mode particle resonances. We develop a means of following guiding center orbits which is greatly superior to the met… more
Date: March 29, 2013
Creator: R.B. White, G. Spizzo and M. Gobbin
Partner: UNT Libraries Government Documents Department
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Hyperon polarization, crystal channeling, and E781 at Fermilab

Description: Early experiments at Fermilab observed significant polarization of inclusively produced hyperons. these and subsequent experiments showed that {Lambda}{degree} were produced polarized while {bar {Lambda}}{degree} had no polarization in the same kinematical region. Other hyperons and antihyperons were also seen to be polarized. Recent Fermilab experiments have showed this to be a rich and complex phenomena. Theoretical understanding is still lacking. Fermilab E761 has shown that bent single crys… more
Date: January 1, 1994
Creator: Lach, J.
Partner: UNT Libraries Government Documents Department
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Heavy fermion mass predictions and renormalization group equations

Description: It has recently become popular to predict the low energy fermion mass spectrum based on a high scale, M[sub x] [approximately] 10[sup 16] GeV/c[sup 2], ansatz for the Yukawa couplings. The evolution to low energy being achieved using renormalization group equations, with supersymmetry extant above a breaking scale M[sub s] [approx] 10[sup 3] GeV/c[sup 2]. In this paper it is shown how the heavy fermion and Higgs masses are determined by fixed points and thus will obtain in many specific models.… more
Date: December 1, 1992
Creator: Knowles, I. G. (Argonne National Lab., IL (United States)); Froggatt, C. D. & Moorhouse, G. (Glasgow Univ. (United Kingdom). Dept. of Physics and Astronomy)
Partner: UNT Libraries Government Documents Department
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Wong's equations and the small x effective action in QCD

Description: We propose a new form for the small x effective action in QCD. This form of the effective action is motivated by Wong's equations for classical, colored particles in non-Abelian background fields. We show that the BFKL equation, which sums leading logarithms in x, is efficiently reproduced with this form of the action. We argue that this form of the action may be particularly useful in computing next-to-leading-order results in QCD at small x.
Date: July 13, 2000
Creator: Jalilian-Marian, Jamal; Jeon, Sangyong & Venugopalan, Raju
Partner: UNT Libraries Government Documents Department
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Extended gauge sectors

Description: Present and future prospects for the discovery of new gauge bosons, Z{prime} and W{prime}, are reviewed. Particular attention is paid to hadron and e{sup +}e{sup {minus}} collider searches for the W{prime} of the Left-Right Symmetric Model.
Date: February 1, 1995
Creator: Rizzo, T. G.
Partner: UNT Libraries Government Documents Department
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The Interactions Of Strange Particles

Description: This report is a corrected copy of the authors "rapporteur talk" at the 1959 Kiev Conference on High Energy Physics. It contains data on the rapporteur system and on interactions of strange particles with protons and neutrons, using data from bubble chambers, counters, and emulsions.
Date: August 11, 1960
Creator: Alvarez, Luis W.
Partner: UNT Libraries Government Documents Department
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Supersymmetric renormalisation group fixed points and third generation fermion mass predictions

Description: We present a supersymmetric renormalization group fixed point determination of the third generation fermion masses, in which the large mass ratio between the top and bottom quarks is attributed to a hierarchy in the vacuum expectation values of the two Higgs doublets. Above a supersymmetry breaking scale, M{sub s}, we use the minimal supersymmetric standard model with a transition at M{sub s} to the standard model with only one Higgs- doublet effective. The mass predictions result from renormal… more
Date: September 1, 1992
Creator: Froggatt, C. D.; Moorhouse, R. G. & Knowles, I. G.
Partner: UNT Libraries Government Documents Department
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Charmonium physics at a tau-charm factory

Description: Since its discovery in 1974 the charmonium system has served hadron physics as an important arena for the investigation of many aspects of QCD and hadron spectroscopy. In this summary the author briefly reviews some of these and discusses several of the important outstanding issues in hadron spectroscopy and their relation to the spectrum and couplings of resonances in the charmonium system. The topics discussed are charmonium spectroscopy, electromagnetic couplings ({gamma}, {gamma}{gamma} and… more
Date: November 1, 1993
Creator: Barnes, T.
Partner: UNT Libraries Government Documents Department
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Radiative B decays

Description: We summarize the constraints placed on physics beyond the Standard Model from the recent CLEO observations of the exclusive decay B {yields} K*{gamma} and bound on the inclusive model b {yields} s{gamma}.
Date: January 1, 1994
Creator: Hewett, J. L.
Partner: UNT Libraries Government Documents Department
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Evidence for t{bar t} production at the Tevatron: Statistical significance and cross section

Description: We summarize here the results of the ``counting experiments`` by the CDF Collaboration in the search of t{bar t} production in p{bar p} collisions at {radical}s = 1800 TeV at the Tevatron. We analyze their statistical significance by calculating the probability that the observed excess is a fluctuation of the expected backgrounds, and assuming the excess is from top events, extract a measurement of the t{bar t} production cross-section.
Date: September 1, 1994
Creator: Koningsberg, J.
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))
Partner: UNT Libraries Government Documents Department
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Light quarks and small X physics

Description: The significance of the low k{perpendicular} part of the Lipatov equation for the QCD soft Pomeron is discussed. It is then argued that light quarks are essential for the emergence of confinement and a Pomeron with the right physical properties. The implications for small {times} parton distributions are considered.
Date: June 15, 1992
Creator: White, A. R.
Partner: UNT Libraries Government Documents Department
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Evidence for top quark production in 1.8 TeV {bar p}p collisions

Description: This report is a summary of the evidence for top quark production in {bar p}p collisions at a center of mass energy of 1.8 TeV which was obtained by the CDF Collaboration earlier this year. The data analyzed corresponds to an integrated luminosity of 19.3 pb{sup {minus}1}, recorded with the CDF Detector at the Fermilab Tevatron Collider during 1992-1993. Three different search channels for t{bar t} production are used. A search for dilepton events finds 2 events, while two different methods of … more
Date: September 1, 1994
Creator: Jensen, H. B.
Partner: UNT Libraries Government Documents Department
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Constraints on the left-right symmetric model from b {yields} s{gamma}

Description: The recent observation by the CLEO Collaboration of the inclusive decay b {yields} s{gamma} with a branching fraction consistent with the expectations of the Standard Model is used to constrain the parameter space of the Left-Right Symmetric Model. Two scenarios are considered: (1) equal left- and right-handed Cabibbo-Kobayashi-Maskawa mixing matrices, V{sub L} = V{sub R}(or V{sub R}*) and (2) the Gronau-Wakaizumi model wherein B-decays proceed only via right-handed currents and V{sub L} and V{… more
Date: November 1, 1994
Creator: Rizzo, T. G.
Partner: UNT Libraries Government Documents Department
open access

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.
Partner: UNT Libraries Government Documents Department
open access

Heavy quark production and spectroscopy

Description: This review covers many new experimental results on heavy flavor production and spectroscopy. It also shows some of the increasingly improved theoretical understanding of results in light of basic perturbative QCD and heavy quark symmetry. At the same time, there are some remaining discrepancies among experiments as well as significant missing information on some of the anticipated lowest lying heavy quark states. Most interesting, perhaps, are some clearly measured production effects awaiting … more
Date: November 1, 1993
Creator: Appel, J. A.
Partner: UNT Libraries Government Documents Department
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