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Weak interaction effects in e/sup +/e/sup -/ annihilation with polarised beams

Description: Although the standard gauge model of weak and electromagnetic interactions based on the work of Salam and Weinberg has met with great success, there are experimental facts that will require its extension or its modification to a new gauge model; the discovery of a heavy lepton at SLAC and the absence of parity violation in atoms that is expected from the neutral weak current coupling to electrons are discussed. Three tests are proposed that bear on these questions. First, heavy lepton productio… more
Date: November 2, 1977
Creator: Simard, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Topics in particle physics and cosmology

Description: The Standard Model of particle physics, together with the Big Bang model of the early universe, constitute a framework which encompasses our current understanding of fundamental laws and beginning of our universe. Despite recent speculative trends, quantum field theory remains the theoretical tool of choice for investigating new physics either at high energy colliders, or in the early universe. In this dissertation, several field theoretic phenomena relevant to cosmology or particle physics are… more
Date: August 2, 1991
Creator: Hsu, S.D.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Vector Unparticle Contributions to Lepton g-2

Description: The generic unparticle propagator may be modified in two ways. Breaking the conformal symmetry effectively adds a mass term to the propagator, while considering vacuum polarization corrections adds a width-like term. Both of these modifications result naturally from the coupling of the unparticle to standard model (SM) fields. We explore how these modifications to the propagator affect the calculation of the lepton anomalous magnetic moment using an integral approximation of the propagator that… more
Date: February 2, 2009
Creator: Conley, John A. & Gainer, James S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Introduction to Electroweak Symmetry Breaking

Description: The Standard Model (SM) is the backbone of elementary particle physics-not only does it provide a consistent framework for studying the interactions of quark and leptons, but it also gives predictions which have been extensively tested experimentally. In these notes, I review the electroweak sector of the Standard Model, discuss the calculation of electroweak radiative corrections to observables, and summarize the status of SM Higgs boson searches. Despite the impressive experimental successes,… more
Date: October 2, 2008
Creator: Dawson,S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sorting chromatic sextupoles for easily and effectively correcting second order chromaticity in the Relativistic Heavy Ion Collider

Description: Based on the contributions of the chromatic sextupole families to the half-integer resonance driving terms, we discuss how to sort the chromatic sextupoles in the arcs of the Relativistic Heavy Ion Collider (RHIC) to easily and effectively correct the second order chromaticities. We propose a method with 4 knobs corresponding to 4 pairs of chromatic sextupole families to online correct the second order chromaticities. Numerical simulation justifies this method, showing that this method reduces … more
Date: January 2, 2009
Creator: Luo, Y.; Tepikian, S.; Fischer, W.; Robert-Demolaize, G. & Trbojevic, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dynamic aperture evaluation of the proposed lattices for the RHIC 2009 polarized proton run

Description: In the article we evaluate the dynamic apertures of the proposed lattices for the coming Relativistic Heavy Ion Collider (RHIC) 2009 polarized proton (pp) 100 GeV and 250 GeV runs. One goal of this study is to find out the appropriate {beta}* for the coming 2009 pp runs. Another goal is to study the effect of second order chromaticity correction in the RHIC pp runs.
Date: January 2, 2009
Creator: Luo, Y.; Bai, M.; Beebe-Wang, J.; Fischer, W.; Montag, C.; Robert-Demolaize, G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Angular Distributions in the Decays B to K*l+l-

Description: The authors use a sample of 384 million B{bar B} events collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider to study angular distributions in the rare decays B {yields} K*{ell}{sup +}{ell}{sup -}, where {ell}{sup +}{ell}{sup -} is either e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -}. For low dilepton invariant masses, m{sub {ell}{ell}} < 2.5 GeV/c{sup 2}, they measure a lepton forward-backward asymmetry {Alpha}{sub FB} = 0.24{sub -0.23}{sup +0.18} {+-} 0.05 and K* longitud… more
Date: May 2, 2008
Creator: Collaboration, The BABAR & Aubert, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Hard X-ray View on Two Distant VHE Blazars: 1ES 1101-232 and 1ES 1553+113

Description: TeV-blazars are known as prominent non-thermal emitters across the entire electromagnetic spectrum with their photon power peaking in the X-ray and TeV-band. If distant, absorption of -ray photons by the extragalactic background light (EBL) alters the intrinsic TeV spectral shape, thereby affecting the overall interpretation. Suzaku observations for two of the more distant TeV-blazars known to date, 1ES 1101-232 and 1ES 1553+113, were carried out in May and July 2006, respectively, including a … more
Date: May 2, 2008
Creator: Reimer, A.; Costamente, L.; /Stanford U., HEPL /KIPAC, Menlo Park; Madejski, G.; /KIPAC, Menlo Park /SLAC; Reimer, O. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of Booster Scraping in Polarized Proton Runs 2006 and 2008

Description: Effects of the Booster vertical scraping on the RHIC beam polarization, the RHIC beam emittance, and on the Booster to AGS transfer efficiency and AGS transmission as well, are further studied. In [1], the strong dependence of the RHIC beam polarization and emittance on bunch intensity in proton run 2008 (pp08) is compared with the proton run 2006 (pp06), where the dependence is much weaker. The setting in the AGS Booster, mainly the vertical scraping, is suspected to having played a role in th… more
Date: January 2, 2009
Creator: Zhang, S. Y.; Ahrens, L.; Huang, H. & Zeno, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurements of B to {pi, eta, eta'} l nu Branching Fractions andDetermination of |Vub| with Semileptonically Tagged B Mesons

Description: The authors report measurements of branching fractions for the decays B {yields} P{ell}{nu}{sub {ell}}, where P are the pseudoscalar charmless mesons {pi}{sup -}, {pi}{sup 0}, {eta} and {eta}{prime}, based on 348 fb{sup -1} of data collected with the BABAR detector, using B{sup 0} and B{sup +} mesons found in the recoil of a second B meson decaying as B {yields} D{sup (*)}{ell}{nu}{sub {ell}}. Assuming isospin symmetry, they combine pionic branching fractions to obtain {Beta}(B{sup 0} {yields} … more
Date: June 2, 2008
Creator: Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of the Noncommutative Standard Model in WW Scattering

Description: We examine W pair production in the Noncommutative Standard Model constructed with the Seiberg-Witten map. Consideration of partial wave unitarity in the reactions WW {yields} WW and e{sup +}e{sup -} {yields} WW shows that the latter process is more sensitive and that tree-level unitarity is violated when scattering energies are of order a TeV and the noncommutative scale is below about a TeV. We find that WW production at the LHC is not sensitive to scales above the unitarity bounds. WW produc… more
Date: December 2, 2008
Creator: Conley, John A. & Hewett, JoAnne L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Superconducting Storage Cavity for RHIC

Description: This document provides a top-level description of a superconducting cavity designed to store hadron beams in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. It refers to more detailed documents covering the various issues in designing, constructing and operating this cavity. The superconducting storage cavity is designed to operate at a harmonic of the bunch frequency of RHIC at a relatively low frequency of 56 MHz. The current storage cavities of RHIC operate at 1… more
Date: January 2, 2009
Creator: Ben-Zvi, Ilan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quark--parton model with large parton k/sub T/

Description: The quark--parton model is generalized to allow for arbitrarily large parton k/sub T/. Since it is expected that < k/sub T/ > will rise with Q/sup 2/ in (highly virtual) photon mediated processes, this generalization is necessary to restore the applicability of the quark-parton model. By treating k/sub T/ as an essential kinematical variable, the introduction of a new scaling variable z is considered. Together with Bjorken's x variable, a unified kinematical description is given of the four dis… more
Date: February 2, 1978
Creator: Hwa, R.C.; Matsuda, S. & Roberts, R.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Limits on the masses of supersymmetric particles from 1. 8 TeV p p collisions

Description: Preliminary analysis of p{bar p} collision events at {radical}s = 1.8 TeV using events with large missing transverse energy and on two (four) jets in a minimal SUSY model places new limits on the masses of squarks (gluinos). The data sample (4 pb{sup {minus}1}) was taken in 1988--89 and is approximately 160 times as large as the data sample from our earlier 1987 run (25 nb{sup {minus}1}). 5 refs., 1 fig.
Date: October 2, 1990
Creator: Beretvas, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Software for the ACP (Advanced Computer Program) multiprocessor system

Description: Software has been developed for use with the Fermilab Advanced Computer Program (ACP) multiprocessor system. The software was designed to make a system of a hundred independent node processors as easy to use as a single, powerful CPU. Subroutines have been developed by which a user's host program can send data to and get results from the program running in each of his ACP node processors. Utility programs make it easy to compile and link host and node programs, to debug a node program on an ACP… more
Date: February 2, 1987
Creator: Biel, J.; Areti, H.; Atac, R.; Cook, A.; Fischler, M.; Gaines, I. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A tau -- charm -- factory at Argonne. Preliminary assessment of the physics case and the Argonne Site

Description: Depending on the beam energy setting, the {tau} -- charm -- factory will be optimized to study physics with {tau} leptons, with charmed mesons, or with charmonium states. This report gives a short overview of the physics of these topics. Also discussed are the detectors and the costs associated with this project.
Date: February 2, 1994
Creator: Berger, E.; Fields, T.; Grosnick, D.; Norem, J.; Repond, J. & Schoessow, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Topics in particle physics and cosmology

Description: The Standard Model of particle physics, together with the Big Bang model of the early universe, constitute a framework which encompasses our current understanding of fundamental laws and beginning of our universe. Despite recent speculative trends, quantum field theory remains the theoretical tool of choice for investigating new physics either at high energy colliders, or in the early universe. In this dissertation, several field theoretic phenomena relevant to cosmology or particle physics are… more
Date: August 2, 1991
Creator: Hsu, S. D. H.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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A summary of the results from LASS (Large Aperture Superconducting Solenoid) and the future of strange quake spectroscopy

Description: A brief summary is presented of results pertinent to quark spectroscopy derived from high statistics data on K{sup {minus}}p interactions obtained with the LASS spectrometer at SLAC. The present status of strange meson spectroscopy is briefly reviewed, and the impact of the proposed KAON Factory on the future of the subject considered. 36 refs., 24 figs.
Date: May 2, 1990
Creator: Aston, D.; Bienz, T.; Bird, T.; Dunwoodie, W.; Johnson, W.; Kunz, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for 14.4-KeV Solar Axions Emitted in the M1-Transition of Fe-57 Nuclei with CAST

Description: We have searched for 14.4 keV solar axions or more general axion-like particles (ALPs), that may be emitted in the M1 nuclear transition of 57Fe, by using the axion-to-photon conversion in the CERN Axion Solar Telescope (CAST) with evacuated magnet bores (Phase I). From the absence of excess of the monoenergetic X-rays when the magnet was pointing to the Sun, we set model-independent constraints on the coupling constants of pseudoscalar particles that couple to two photons and to a nucleon g{su… more
Date: December 2, 2011
Creator: Andriamonje, S.; Aune, S.; Autiero, D.; Barth, K.; Belov, A.; Beltran, B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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D0 Solenoid Upgrade Project: Vacuum Pumping Calculations for the D0 Solenoid

Description: This engineering note documents the calculations done to determine the vacuum pumping speed for the D-Zero solenoid. The raw calculations are attached. A summary of the results are listed. The vacuum pumping speed of the solenoid is determined by the conductance of the pumping path. At higher pressure ranges during initial pumpdown, the conductances will be rather high. Calculations were not done for the transient pumpdown period, only the steady state type pumping situation. The pressure is as… more
Date: August 2, 1993
Creator: Rucinski, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Semileptonic Decays

Description: The following is an overview of the measurements of the CKM matrix elements |V{sub cb}| and |V{sub ub}| that are based on detailed studies of semileptonic B decays by the BABAR and Belle Collaborations and major advances in QCD calculations. In addition, a new and improved measurement of the ratios R(D{sup (*)}) = {Beta}({bar B} {yields} D{sup (*)}{tau}{sup -}{bar {nu}}{sub {tau}})/{Beta}({bar B} {yields} D{sup (*)}{ell}{sup -}{bar {nu}}{sub {ell}}) is presented. Here D{sup (*)} refers to a D o… more
Date: October 2, 2012
Creator: Luth, Vera G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent Results in Semileptonic B Decays with BaBar

Description: In this note, recent results of studies of semileptonic B meson decays from BABAR are discussed and preliminary results given. In particular, a recent measurement of {Beta}(B {yields} D{sup (*)}{tau}{nu}) and the ratio {Beta}(B {yields} D{sup (*)}{tau}{nu})/{Beta}(B {yields} D{sup (*)}{ell}{nu}) is presented. For the D* mode, a branching fraction of 1.79 {+-} 0.13(stat) {+-} 0.17(syst) is found, with a ratio of 0.325 {+-} 0.023(stat) {+-} 0.027(syst). For the D mode, the results are 1.04 {+-} 0… more
Date: April 2, 2012
Creator: Hamilton, B.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Results on Searches for New Physics at B Factories

Description: We summarize recent results on B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} setting constraints on the charged Higgs mass, discuss the CP puzzle in B {yields} K{pi} decays and present searches for a light neutral Higgs in radiative {Upsilon}(2S) and {Upsilon}(3S) decays. Rare decays are processes with branching fractions of {Omicron}(10{sup -4}) or smaller. Typically, they arise if amplitudes of higher-order processes (penguin loops, box diagrams) become dominant because tree amplitudes are su… more
Date: December 2, 2011
Creator: Eigen, Gerald
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Enhancing the CDF's B physics program with a faster data acquisition system.

Description: The physics program of Run II at the Tevatron includes precision electroweak measurements such as the determination of the top quark and W boson masses; bottom and charm physics including the determination of the B{sub s} and D{sup 0} mixing parameters; studies of the strong interaction; and searches for the Higgs particle, supersymmetric particles, hidden space-time dimensions and quark substructure. All of these measurements benefit from a high-resolution tracking detector. Most of them rely … more
Date: March 2, 2011
Creator: Maksimovic, Dr. Petar
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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