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math-ph2001
Enlarged geometries of gauge bundles
R. Aldrovandi, A. L. Barbosa
The geometrical picture of gauge theories must be enlarged when a gauge potential ceases to behave like a connection, as it does in electroweak interactions. When the gauge group h…
math-ph2001
Mixing angle and Glashow's Algebra
A. L. Barbosa
Considering transformations in the basis of fundamental fields on a principal fiber bundle, without modification in the space-time sector, we construct an algebra GA, which we call…
gr-qc2001
Kinematics of a Spacetime with an Infinite Cosmological Constant
R. Aldrovandi, A. L. Barbosa, M. Calcada +1
A solution of the sourceless Einstein's equation with an infinite value for the cosmological constant Λis discussed by using Inonu-Wigner contractions of the de Sitter groups and s…