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22 papers · 1 filter
Subcluster Merger and Galaxy Infall in A2151
C. M. Bird, D. S. Davis, T. C. Beers
We have obtained a 12.5 ksec image of the Hercules Cluster, A2151, with the {\it ROSAT} PSPC. Comparison of the optical and X-ray data suggest the presence of at least three distin…
Dynamical Chiral Symmetry Breaking, Goldstone's Theorem and the Consistency of the Schwinger--Dyson and Bethe--Salpeter Equations
H. J. Munczek
A proof of Goldstone's theorem is given for the case in which global chiral symmetry is dynamically broken. The proof highlights a needed consistency between the exact Schwinger--D…
A Nonperturbative, Schwinger-Dyson-Equation Analysis of Quark Masses and Mixings in a Model with QCD and Higgs Interactions
Lesley L. Smith, Pankaj Jain, Douglas W. McKay
The Landau gauge Schwinger-Dyson Equation for the quark self-energy is solved in the quenched ladder approximation for several cases of one- and two-quark-generations. The exchange…
Small-X Quarks at HERA Predict the Ultra High Energy Neutrino-Nucleon Cross Section
George M. Frichter, Douglas W. McKay, John P. Ralston
New structure function data at small Bjorken from HERA are used along with next-to-leading order QCD evolution to predict a cross section for charged-current interactions of ul…
Gravitational instability in the strongly nonlinear regime: A study of various approximations
B. S. Sathyaprakash, V. Sahni, D. Munshi +2
We study the development of gravitational instability in the strongly non-linear regime. For this purpose we use a number of statistical indicators such as filamentary statistics,…
Detecting Bimodality in Astronomical Datasets
Keith M. Ashman, Christina M. Bird, Steven E. Zepf
We discuss statistical techniques for detecting and quantifying bimodality in astronomical datasets. We concentrate on the KMM algorithm, which estimates the statistical significan…