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A Revised Magnitude and Distance Amplitude Correction (MDAC2) Procedure for Regional Seismic Discriminants: Theory and Testing at NTS

Description: The Magnitude and Distance Amplitude Correction (MDAC; Taylor and Hartse, 1998; Taylor et al., 2002) procedure for correcting regional seismic amplitudes for seismic event identification has been modified to include more realistic earthquake source models and source scaling. In the MDAC2 formulation we generalize the Brune (1970) earthquake source spectrum to use a more physical apparent stress model that can represent non-constant stress-drop scaling. We also event include a parameter that all… more
Date: December 21, 2001
Creator: Walter, W R & Taylor, S R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quantum non-locality in a two-slit interferometer for short-lived particles

Description: We describe a new test of quantum nonlocality, using an interferometer for short-lived particles. The separation is large compared with the particle lifetimes. This interferometer is realized by vector meson production in distant heavy ion collisions. The mesons decay before waves from the two sources (ions) can overlap, so interference is only possible among the decay products. The post-decay wave function must retain amplitudes for all possible decays. The decay products are spatially separat… more
Date: December 1, 2001
Creator: Klein, Spencer R. & Nystrand, Joakim
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synchrotron radiation from electron beams in plasma focusing channels

Description: Spontaneous radiation emitted from relativistic electrons undergoing betatron motion in a plasma focusing channel is analyzed and application to plasma wakefield accelerator experiments and to the ion channel laser (ICL) are discussed. Important similarities and differences between a free electron laser (FEL) and an ICL are delineated. It is shown that the frequency of spontaneous radiation is a strong function of the betatron strength parameter alpha-beta, which plays a similar role to that of… more
Date: December 6, 2001
Creator: Esarey, E.; Shadwick, B. A.; Catravas, P. & Leemans, W. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Feynman-Schwinger (World Line) Representation in Perturbative QCD

Description: The proper time path integral representation is derived explicitly for an arbitrary $n$-point amplitude in QCD. In the standard perturbation theory the formalism allows to sum up the leading subseries, e.g. yielding double-logarithm Sudakov asymptotics for form factors. Correspondence with the standard perturbation theory is established and connection to the Bern-Kosower-Strassler method is illustrated.
Date: December 1, 2001
Creator: Simonov, Yu A. & Tjon, J.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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