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Argonne National Laboratory Physics Division Summary Report: September, October 1960

Description: The use and operation of the Van de Graaff generator are summarized for the period from January 1 to June 30, 1960. Molecular beam study final results are given for Mn/sup 56/, and progress on the new atomic-beam machine is reported to date. A preliminary investigation was made of the neutron total cross section of cobalt. Results are presented. The decomposition of trichlorobromomethane by the isomeric transition of 4.4-hr Br/sup 80m/ and to 1000 deg F. /sup -/, decay of 35.9-hr Br/sup 82/ was… more
Date: October 1961
Creator: Argonne National Laboratory. Physics Division.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Use of Taus in ATLAS

Description: The total production rate for taus at a hadron collider is not a useful quantity. Taus must have significant transverse momentum (p{sub T}) in order to be observable. Leptonic decays of taus will yield isolated electrons or muons that can be detected but these can also be directly produced so discriminating their origin can be difficult. Hadronic decays of taus result in jets that must be distinguished from jets arising from QCD processes using the particle multiplicity and invariant mass. At t… more
Date: October 24, 2002
Creator: Hinchliffe, Ian
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dynamical (super) symmetry breaking

Description: Dynamical Symmetry Breaking (DSB) is a concept theoristsrely on very often in the discussions of strong dynamics, model building,and hierarchy problems. In this talk, I will discuss why this is such apermeating concept among theorists and how they are used in understandingphysics. I also briefly review recent progress in using dynamicalsymmetry breaking to construct models of supersymmetry breaking andfermion masses.
Date: October 3, 2000
Creator: Murayama, Hitoshi
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Precision cosmology and the landscape

Description: After reviewing the cosmological constant problem -- why is Lambda not huge? -- I outline the two basic approaches that had emerged by the late 1980s, and note that each made a clear prediction. Precision cosmological experiments now indicate that the cosmological constant is nonzero. This result strongly favors the environmental approach, in which vacuum energy can vary discretely among widely separated regions in the universe. The need to explain this variation from first principles constitut… more
Date: October 1, 2006
Creator: Bousso, Raphael & Bousso, Raphael
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Inelastic final-state interaction

Description: The final-state interaction in multichannel decay processes is systematically studied with application to B decay in mind. Since the final-state interaction is intrinsically interwoven with the decay interaction in this case, no simple phase theorem like"Watson's theorem" holds for experimentally observed final states. We first examine in detail the two-channel problem as a toy-model to clarify the issues and to remedy common mistakes made in earlier literature. Realistic multicha… more
Date: October 29, 2007
Creator: Suzuki, Mahiko & Suzuki, Mahiko
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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TOPOLOGICAL THEORY OF HADRONS II: BARYONS

Description: The first paper of this series described a method for incorporating spin into the meson sector of the topological theory of hadrons. This second paper extends the theory to all hadrons. It also incorporates into the covariant S-matrix topological framework the group-theoretic properties of the constituent quark model.
Date: October 1, 1981
Creator: Stapp, Henry P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bound states and the Bekenstein bound

Description: We explore the validity of the generalized Bekenstein bound, S<= pi M a. We define the entropy S as the logarithm of the number of states which have energy eigenvalue below M and are localized to a flat space region of width alpha. If boundary conditions that localize field modes are imposed by fiat, then the bound encounters well-known difficulties with negative Casimir energy and large species number, as well as novel problems arising only in the generalized form. In realistic systems, how… more
Date: October 16, 2003
Creator: Bousso, Raphael
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Supersymmetric Fat Higgs

Description: Supersymmetric models have traditionally been assumed to be perturbative up to high scales due to the requirement of calculable unification. In this note I review the recently proposed `Fat Higgs' model which relaxes the requirement of perturbativity. In this framework, an NMSSM-like trilinear coupling becomes strong at some intermediate scale. The NMSSM Higgses are meson composites of an asymptotically-free gauge theory. This allows us to raise the mass of the Higgs, thus alleviating the MSSM … more
Date: October 27, 2004
Creator: Harnik, Roni
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Study of Dark Matter inspired cMSSM scenarios at a TeV-class Linear Collider

Description: The accuracy in the measurement of the masses of sleptons and heavy Higgs bosons in cMSSM scenarios, compatible with the WMAP result on cold dark matter, has been re-analysed in view of the requirements for predicting this density to a few percent level from SUSY measurements at the linear collider.
Date: October 8, 2004
Creator: Battaglia, Marco
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Alternatives to Seesaw

Description: The seesaw mechanism is attractive not only because it"explains'' small neutrino mass, but also because of its packaging with the SUSY-GUT, leptogenesis, Dark Matter, and electroweak symmetry breaking. However, this package has the flavor, CP, and gravitino problems. I discuss two alternatives to the seesaw mechanism. In one of them, the anomaly-mediated supersymmetry breaking solves these problems, while predicts naturally light Dirac neutrinos. In the other, the light Majorana neutrinos … more
Date: October 10, 2004
Creator: Murayama, Hitoshi
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Bevatron Research Meeting I - Bevatron as a Research Instrument

Description: The Bevatron status is: (1) Physical structure of magnet now assembled and being tested. Initial pulsing to rated field currents indicate that magnet is performing as designed. Currents of the order of 8500 amps peak have already been rendered. (About 15,000 gauss). (2) Pumpdown time to approximately 10{sup -5} mm Hg is of the order of 24 hours at present but is expected to improve to 12-15 hours as the high vapor pressure solvents are removed. Lofgren and Brobeck expect that it will be possibl… more
Date: October 6, 1953
Creator: Lofgren, Edward
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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BEVATRON RESEARCH MEETING IV - BEVATRON TARGETS AND PROBES

Description: The targets and probes will be introduced 6-inches below the median plane so that adequate mechanical support can be effectively utilized without reducing the aperture. Probe heads will be of such configuration as to allow monitoring of any desired vertical strip of the aperture. It is probable that some space will be available in the quadrants after first performance tests have been on the machine. No targets or probes will be located in that 1-foot x 4-foot aperture initially. Provision will … more
Date: October 27, 1953
Creator: Chupp, Warren
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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BEVATRON RESEARCH MEETING III - BEVATRON THEORY

Description: Despite the essentially independent development of the Cosmotron and Bevatron, these two accelerators have general specifications which are the same within a factor of 2-3 in their pertinent characteristics. An electron analogue of the Bevatron would be an electron synchrotron operating in the 5 kev to 3 Mev range.
Date: October 20, 1953
Creator: Smith, Lloyd
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lattice design for an ILC damping ring with 3 km circumference

Description: We describe a simple lattice that meets the specifications for the damping times and horizontal and longitudinal emittances for the International Linear Collider (ILC) damping rings. The circumference of a little over 3 km leads to a bunch spacing of around 3 ns, which will require advances in kicker technology for injection and extraction. We present the lattice design, and initial results of studies of the acceptance and collective effects. With the high bunch charge and close spacing, the io… more
Date: October 11, 2004
Creator: Wolski, Andrzej
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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INFRARED STUDIES OF PULSARS

Description: The light curve of the Crab Nebula Pulsar has been studied in the near infrared (.9 {micro}m - 2.4 {micro}m) and found to be similar to the optical light curve except for a shoulder after each main peak. A search for infrared pulsations from other promising candidates was negative, with typical upper limits 3 - 5 magnitudes fainter than the Crab.
Date: October 1, 1980
Creator: Pennypacker, Carlton R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron cloud development in the Proton Storage Ring and in theSpallation Neutron Source

Description: We have applied our simulation code "POSINST" to evaluatethe contribution to the growth rate of the electron-cloud instability inproton storage rings. Recent simulation results for the main features ofthe electron cloud in the storage ring of the Spallation Neutron Source(SNS) at Oak Ridge, and updated results for the Proton Storage Ring (PSR)at Los Alamos are presented in this paper. A key ingredient in our modelis a detailed description of the secondary emitted-electron energyspectrum. A refi… more
Date: October 8, 2002
Creator: Pivi, M. T. F. & Furman, M. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Is the Universal String Axion the QCD Axion

Description: We consider the class of effective supergravity theories from the weakly coupled heterotic string in which local supersymmetry is broken by gaugino condensation in a hidden sector, with dilaton stabilization achieved through corrections to the classical dilaton Kahler potential. If there is a single hidden condensing (simple) gauge group, the axion is massless (up to contributions from higher dimension operators) above the QCD condensation scale. We show how the standard relation between the ax… more
Date: October 14, 2005
Creator: Gaillard, Mary K. & Kain, Ben
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Options for Production Staging for a Low Energy Neutrino Factory

Description: A low energy neutrino factory (LENF) is defined, for the purpose of this report, to accelerate a muon beam to a total energy in the range of 10-14 GeV, and store it in a decay ring directing a resulting neutrino beam to a detector 2200-2300 km distant. The machine should be ultimately capable of producing 10{sup 21} decays toward that detector per year of 10{sup 7} s. We consider such a neutrino factory to be the accelerator defined in the Interim Design Report (IDR) of the International Design… more
Date: October 26, 2011
Creator: Berg, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Proton Decay and the Planck Scale

Description: Even without grand unification, proton decay can be a powerful probe of physics at the highest energy scales. Supersymmetric theories with conserved R-parity contain Planck-suppressed dimension 5 operators that give important contributions tonucleon decay. These operators are likely controlled by flavor physics, which means current and near future proton decay experiments might yield clues about the fermion mass spectrum. I present a thorough analysis of nucleon partial lifetimes in supersymmet… more
Date: October 2, 2004
Creator: Larson, Daniel T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Fission of thorium with Alpha Particles

Description: Soon after the discovery of fission, Meitner, Bretscher and Cook found differences in the decay of various chemical fractions separated from uranium irradiated with slow neutrons and thorium irradiated with fast neutrons respectively and suggested that a difference existed in the distribution of fission products in the two cases. In 1940, Turner suggested that the distribution in various modes of fission should be investigated. The fact that elements such as tin, cadmium, palladium, and silver … more
Date: October 15, 1948
Creator: Newton, Amos S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ANALYSIS OF THE INTERACTION OF 300-Mev NEUTRONS WITH XENON

Description: An investigation of the interactions between 300-Mev neutrons and xenon was made by means of a cloud chamber in a pulsed magnetic field of 21,700 gauss placed in the neutron beam of the 184-inch Berkeley cyclotron. Eighty-seven negative pion events and 257 other stars were analyzed. In addition an experimental check was made on the energy of the incoming neutrons. Classification, identification, and angular and energy distributions of prongs associated with all events are presented. Interpretat… more
Date: October 17, 1956
Creator: Morris, Richard Herbert.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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