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48 papers · 1 filter
Measurement of the Isolated Photon Cross Section in p-pbar Collisions at sqrt{s}=1.96 TeV
D0 Collaboration
The cross section for the inclusive production of isolated photons has been measured in p anti-p collisions at sqrt{s}=1.96 TeV with the D0 detector at the Fermilab Tevatron Collid…
Troubles for observing the inflaton potential
H. P. de Oliveira, C. A. Terrero-Escalante
Robustness of the solutions to the inflaton potential inverse problem based on the slow-roll approximation is addressed. With that aim it is introduced a measure of the difference…
Riemannian and non-Riemannian geometries of filament rods and elastic walls
L. C. Garcia de Andrade
The Riemannian geometry of elastica in one and two dimensions is considered. An example is given of the deflexion or Frenet curvature of the elastic filament rod where the Riemanni…
A study of the gauge invariant, nonlocal mass operator in Yang-Mills theories
M. A. L. Capri, D. Dudal, J. A. Gracey +4
The nonlocal mass operator is considered in Yang-Mills theories in Euclidean space-time. It is shown that the operator $Tr \int d^4x F_{μν}…
Acyclic orientations with path constraints
Rosa M. V. Figueiredo, Valmir C. Barbosa, Nelson Maculan +1
Many well-known combinatorial optimization problems can be stated over the set of acyclic orientations of an undirected graph. For example, acyclic orientations with certain diamet…
High-temperature series expansion of the Helmholtz free energy of the quantum spin-S XYZ chain
Onofre Rojas, S. M. de Souza, E. V. Corrêa Silva +1
We consider the chain model of arbitrary spin in the high temperature region, with external magnetic field and single-ion anisotropy term. Our high-temperature expansion…