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Your search keyword '"de S. Pires, C. A."' showing total 2 results
Start Over Author "de S. Pires, C. A." Journal international journal of modern physics a: particles & fields; gravitation; cosmology; nuclear physics
2 results on '"de S. Pires, C. A."'

1. WARD IDENTITY IN NONCOMMUTATIVE QED.

Author

Mariz, T., De S. Pires, C. A., and Ribeiro, R. F.

Subjects
*QUANTUM electrodynamics, *QUANTUM chromodynamics, *QUANTUM field theory, *ABELIAN categories, *NONCOMMUTATIVE function spaces, *ANNIHILATION reactions
Abstract

Although noncommutative QED presents a non-Abelian structure, it does not present structure constants. In view of this we investigate how Ward identity is satisfied in pair annihilation process and γγ → γγ scattering in noncommutative QED. [ABSTRACT FROM AUTHOR]

Published
2003
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2. Cosmology of Brane-Bulk Models in Five Dimensions.

Author

Mohapatra, R. N., de S. Pires, C. A., and Pérez-Lorenzana, A.

Subjects
*METAPHYSICAL cosmology, *PHYSICS
Abstract

We study the cosmology of models with four space and one time dimension where our universe is a three-brane and report a few results which extend existing work in several directions. Assuming a stable fifth dimension, we obtain a solution for the metric, which does not depend on any arbitrary parameters. We discuss some implications of this result. [ABSTRACT FROM AUTHOR]

Published
2001
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