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50 papers · 1 filter
Numerical Analysis of Dynamical Systems and the Fractal Dimension of Boundaries
L. G. S. Duarte, L. A. C. P. da Mota, H. P. de Oliveira +2
A set of MapleV R.4/5 software routines for calculating the numerical evolution of dynamical systems and flexibly plotting the results is presented. The package consists of an init…
Measurement of the High-Mass Drell-Yan Cross Section and Limits on Quark-Electron Compositeness Scales
B. Abbott
We present a measurement of the Drell-Yan cross section at high dielectron invariant mass using 120/pb of data collected in pbar-p collisions at sqrt(s) = 1.8 TeV by the D0 collabo…
Geodesics in the Gamma spacetime
L. Herrera, Filipe M. Paiva, N. O. Santos
Circular and radial geodesics are studied in the spacetime described by the metric. Their behaviour is compared with the spherically symmetric situation, bringing out the sensi…
Renormalizability of Nonrenormalizable Field Theories
Alberto Blasi, Nicola Maggiore, Silvio P. Sorella +1
We give a simple and elegant proof of the Equivalence Theorem, stating that two field theories related by nonlinear field transformations have the same S matrix. We are thus able t…
On Local Constraints of D=4 Supergravity in Terms of Dirac Eigenvalues
N. Pauna, I. V. Vancea
It has been recently shown that in order to have Dirac eigenvalues as observables of Euclidean supergravity, certain constraints should be imposed on the covariant phase space as w…
Gravitational Collapse of Perfect Fluid
J. F. Villas da Rocha, Anzhong Wang, N. O. Santos
The spherical gravitational collapse of a compact packet consisting of perfect fluid is studied. The spacetime outside the fluid packet is described by the out-going Vaidya radiati…