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147 papers · 1 filter
A Study of the Decay D0->K+pi-
FOCUS Collaboration, Jonathan M. Link
Using a large sample of photoproduced charm mesons from the FOCUS experiment at Fermilab (FNAL-E831), we observe the decay with a signal yield of events…
Long-term Optical Variability of Radio-Selected Quasars from the FIRST Survey
David J. Helfand, Remington P. S. Stone, Beth Willman +5
We have obtained single-epoch optical photometry for 201 quasars, taken from the FIRST Bright Quasar Survey, which span a wide range in radio loudness. Comparison with the magnitud…
Mode-locking in ac-driven vortex lattices with random pinning
Alejandro B. Kolton, Daniel Dominguez, Niels Gronbech-Jensen
We find mode-locking steps in simulated current-voltage characteristics of ac-driven vortex lattices with {\it random} pinning. For low frequencies there is mode-locking above a fi…
Substructure and dynamics of the Fornax Cluster
M. J. Drinkwater, M. D. Gregg, M. Colless
We present the first dynamical analysis of a galaxy cluster to include a large fraction of dwarf galaxies. Our sample of 108 Fornax Cluster members measured with the UK Schmidt Tel…
The Complexity of Finding Small Triangulations of Convex 3-Polytopes
Alexander Below, Jesús A. De Loera, Jürgen Richter-Gebert
The problem of finding a triangulation of a convex three-dimensional polytope with few tetrahedra is proved to be NP-hard. We discuss other related complexity results.
Do precision electroweak constraints guarantee $\epem$ collider discovery of at least one Higgs boson of a type-II two-Higgs-doublet model?
John F. Gunion
The manner in which the parameters of a two-Higgs-doublet model can be chosen so that no Higgs boson is discovered at a $\sqrt{s}\leq 800\gev$ $\epem$ collider, while maintaining c…