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We consider extra dimensional gauge theories on an interval. We first review the derivation of the consistent boundary conditions (BC’s) from the action principle. These BC’s include choices that give rise to breaking of the gauge symmetries. The boundary conditions could be chosen to coincide with those commonly applied in orbifold theories, but there are… (More)

- Csaba Csáki, Christophe Grojean, Luigi Pilo, John Terning
- Physical review letters
- 2004

We present a 5D gauge theory in warped space based on a bulk SU(2)L x SU(2)R x U(1)(B-L) gauge group where the gauge symmetry is broken by boundary conditions. The symmetry breaking pattern and the mass spectrum resemble that in the standard model (SM). To leading order in the warp factor the rho parameter and the coupling of the Z (S parameter) are as in… (More)

We propose a stringy version of the old inflation scenario which does not require any slowroll inflaton potential and is based on a specific example of string compactification with warped metric. Our set-up admits the presence of anti-D3-branes in the deep infrared region of the metric and a false vacuum state with positive vacuum energy density. The latter… (More)

- Roberto Contino, Luigi Pilo, Riccardo Rattazzi, Alessandro Strumia
- 2008

We discuss how to consistently perform effective Lagrangian computations in quantum gravity with branes in compact extra dimensions. A reparametrization invariant and infrared finite result is obtained in a non trivial way. It is crucial to properly account for brane fluctuations and to correctly identify physical observables. Our results correct some… (More)

- Luigi Pilo, Howard Ring, Natasha Quinn, Michael Robert Trimble
- Biological psychiatry
- 1996

Multiple system atrophy (MSA) is a disease causing parkinsonism in which response to levodopa is classically absent, poor, or transient. Idiopathic Parkinson's disease (IPD) itself, which responds favorably to levodopa, has been associated with the development of disease-related depression. Over and above the clinical and pathological characteristics of… (More)

- Luigi Pilo
- Singapore medical journal
- 1993

The psychiatric complications of epilepsy are varied but may be considered under two main groups--those directly related to ictal activity and those that occur during the inter-ictal period. Epilepsy and psychiatry are also similar in that they cause a great deal of social difficulties and restriction in terms of activities and employment opportunities… (More)

- Ian . I . Kogan, Stavros Mouslopoulos, Antonios Papazoglou, Luigi Pilo
- 2001

The radion dynamics related to the presence of moving branes with both positive or negative tensions is studied in the linearized approximation. The radion effective Lagrangian is computed for a compact system with three branes and in particular we examine the decompactification limit when one brane is sent to infinity. In the non-compact case we calculate… (More)

A phase of massive gravity free from pathologies can be obtained by coupling the metric to an additional spin-two field. We study the gravitational field produced by a static spherically symmetric body, by finding the exact solution that generalizes the Schwarzschild metric to the case of massive gravity. Besides the usual 1/r term, the main effects of the… (More)

- Zurab G. Berezhiani, Denis Comelli, Fabrizio Nesti, Luigi Pilo
- Physical review letters
- 2007

Theories with an extra spin-two field coupled to gravity admit a massive phase with broken Lorentz symmetry. While the equivalence principle is respected, the Newtonian potentials are in general modified, but they may be protected by a scale symmetry of the coupling term. The gravitational waves phenomenology is quite rich: two gravitons, one massive and… (More)

- Fabrizio Nesti, Luigi Pilo
- 2009

A systematic study of the different phases of Lorentz-breaking massive gravity in a curved background is performed. For tensor and vector modes, the analysis is very close to that of Minkowski space. The most interesting results are in the scalar sector where, generically, there are two propagating degrees of freedom (DOF). While in maximally symmetric… (More)