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Unitarity and Renormalizability - Together at last
Gary B. Tupper
By construction, gauge theories require gauge fixing. In conventional approaches to spontaneously broken gauge theories, the choice of the Unitary ('t Hooft) gauge involves the sac…
AdS braneworld with Backreaction
Neven Bilic, Gary B. Tupper
We review the tachyon model derived from the dynamics of a 3-brane moving in the AdS5 bulk. The bulk geometry is based on the Randall-Sundrum II model extended to include the radio…
"Warm" Tachyon Matter from Back-reaction on the Brane
Neven Bilic, Gary B. Tupper
We study a 3-brane moving in the five-dimensional bulk of the Randall-Sundrum II model. By including back-reaction of the brane on the bulk geometry we obtain a tachyon model with…
Chaplygin-Kalb-Ramond Quartessence
Neven Bilic, Gary B. Tupper, Raoul D. Viollier
Unified dark matter/energy models (quartessence) based upon the Chaplygin gas D-brane fail owing to the suppression of structure formation by the adiabatic speed of sound. Includin…
Gauges in the Bulk II: Models with Bulk Scalars
Jihn E. Kim, Gary B. Tupper, Raoul D. Viollier
Extending previous work in Randall-Sundrum type models, we construct low-energy effective actions for braneworlds with a bulk scalar field, with special attention to the case of BP…
Gauges in the bulk
Jihn E. Kim, Gary B. Tupper, Raoul D. Viollier
We present a general framework for nonparallel brane worlds and use it to discuss the nonlinear radion problem. By imposing the Einstein frame as a gauge condition we are able to g…