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117 papers · 1 filter
Hard Single Diffraction in pbarp Collisions at root-s = 630 and 1800 GeV
The D0 Collaboration, B. Abbott
Using the D0 detector, we have studied events produced in proton-antiproton collisions that contain large forward regions with very little energy deposition (``rapidity gaps'') and…
Total positivity: tests and parametrizations
Sergey Fomin, Andrei Zelevinsky
An introduction to total positivity (TP), with the emphasis on efficient TP criteria and parametrizations of TP matrices. Intended for general mathematical audience.
First-Principles Calculations of Positron Annihilation in Solids
B. Barbiellini, M. Hakala, R. M. Nieminen +1
We present first-principles approaches based on density functional theory for calculating positron states and annihilation characteristics in condensed matter. The treatment of the…
The Isolated Photon Cross Section in p pbar Collisions at sqrt(s) = 1.8 TeV
D0 Collaboration, B. Abbott
We report a new measurement of the cross section for the production of isolated photons, with transverse energies (ET) above 10 GeV and pseudorapidities |eta| < 2.5, in p pbar coll…
A Fermi Surface study of BaKBiO
S. Sahrakorpi, B. Barbiellini, R. S. Markiewicz +3
We present all electron computations of the 3D Fermi surfaces (FS's) in BaKBiO for a number of different compositions based on the selfconsistent Korringa-Kohn-…
Tensor product multiplicities, canonical bases and totally positive varieties
Arkady Berenstein, Andrei Zelevinsky
We obtain a family of explicit "polyhedral" combinatorial expressions for multiplicities in the tensor product of two simple finite-dimensional modules over a complex semisimple Li…