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in subjects: "Amplitudes"  
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Higher twist contributions to lepton-pair production and other QCD processes

Description: A general discussion of the calculations and phenomenological consequences of power-law suppressed QCD processes is given with emphasis on tests in massive lepton pair production. Absolutely normalized predictions are given for the leading twist (transverse current) and higher twist (longitudinal current) contributions to the meson structure function in the region of large x.
Date: December 1, 1982
Creator: Brodsky, S. J.; Berger, E. L. & Lepage, G. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Measurement of nu/sub e/ and anti nu/sub e/ elastic scattering as a test of the standard model

Description: Various tests of standard SU(2) x U(1) model of weak interactions which can be performed by measurements of electron and muon neutrino-electron elastic scattering are reviewed. Electron neutrino-electron elastic scattering has both a neutral current part as well as a charged current part, and therefore offers a unique place to measure the interference of these two amplitudes. A measurement of the y-dependence of neutrino-electron elastic scattering can separately measure g/sub V/ and g/sub A/ a… more
Date: January 1, 1982
Creator: Abe, K.; Taylor, F.E. & White, D.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Time-domain study of tectonic strain-release effects on seismic waves from underground nuclear explosions

Description: Tectonic strain release affects both the amplitude and phase of seismic waves from underground nuclear explosions. Surface wave magnitudes are strongly affected by the component of tectonic strain release in the explosion. Amplitudes and radiation patterns of surface waves from explosions with even small tectonic components change magnitudes significantly and show a strong dependence on receiver locations. A thrust-slip source superimposed on an isotropic explosion can explain observed reversal… more
Date: September 1, 1982
Creator: Nakanishi, K. K. & Sherman, N. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pion-nucleon scattering and pion production in nucleon-nucleon and nucleus-nucleus collisions

Description: Lecture notes are presented on the following: (1) basic aspects of ..pi..N interactions (properties of pions and nucleons, SU(3) and SU(6) classification phenomenology of ..pi..N scattering ((3.3) resonance; phase shift analysis, and bag model approach to ..pi..N); (2) pion production and absorption in the two nucleon system (NN ..-->.. NN..pi.. (isobar model) and ..pi..d reversible NN (existence of dibaryon resonances)); (3) pion absorption in complex nuclei (multiparticle aspects and cascade … more
Date: January 1, 1982
Creator: Dover, C. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Empirical analysis of seismic records for eleven nuclear tests at the Nevada Test Site

Description: Regional seismic records for eleven underground nuclear explosions were processed and analyzed (empirically) in a search for source and path related patterns in the signals. These nuclear tests were conducted between August, 1979 and April, 1980; all were located in Yucca Flat at the Nevada Test Site (NTS). The seismic signals generated by these explosions were recorded on the LLNL four-station network, located at distances of 200 to 400 km from the NTS. Amplitudes were measured for consistentl… more
Date: August 9, 1982
Creator: Younker, Jean L.; Springer, Donald L. & Vergino, Eileen S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Research results reported by OEO summer (1981) student employees of LLNL working with Earth Sciences (K) Division personnel

Description: Significant experimental results were achieved in a number of research programs that were carried out during the summer of 1981 by students sponsored by the Office of Equal Opportunity at the Lawrence Livermore National Laboratory. These students were working with Earth Sciences (K) Division personnel. Accomplishments include the following: (1) preparation of post-burn stratigraphic sections for the Hoe Creek III experiment, Underground Coal Gasification project; (2) preparation of miscellaneou… more
Date: January 1, 1982
Creator: Doyle, M. C.; Griffith, P. J.; Kreevoy, E. P.; Turner, III, H. J. & Tatman, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hadron mass estimates in the lattice gauge theory

Description: Some estimates for the hadron masses in lattice QCD are presented in the approximation of neglecting dynamic fermion loops. Both light and heavy quark systems are considered and their dependence on the coupling constant and the quark mass is studied. Some results for the decay amplitudes are also given. We discuss how the eta prime mass can be computed to lowest order in n/sub f/, the number of dynamic fermion flavors.
Date: January 1, 1982
Creator: Hamber, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hyperbolic-secant mode coupling

Description: This work presents a new solution of the coupled mode equations for a hyperbolic secant spatial variation of the coupling between two modes. An analytic expression is given for the transmission coefficient for arbitrary complex differential propagation constant and coupling strength. The expression is particularly simple in the case when the differential attenuation between the modes is negligible. Design curves are presented in terms of normalized parameters. The hyperbolic secant coupling may… more
Date: July 1, 1982
Creator: Doane, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetotelluric Responces of Three-Dimentional Bodies in Layered Earths

Description: The electric and magnetic fields scattered by a three-dimensional inhomogeneity in a conducting earth result largely from current-gathering, a boundary polarization charge phenomenon that becomes increasingly important as frequency falls. Boundary charges cause normalized electric field magnitudes, and thus tensor apparent resistivities and magnitudes of vertical admittance elements, to remain anomalous as frequency approaches zero. However, these E-field distortions below certain frequencies a… more
Date: November 1, 1982
Creator: Wannamaker, Phillip E.; Ward, Stanley H. & Hohmann, Gerald W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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