SUSY07

Session

Theoretical Models (String Theory and Formal Aspects of SUSY) 5

Models5

30 Jul 2007, 16:30

Physics Building (Karlsruhe University)

70. Intersecting Brane Models and Cosmology

Jason Kumar (Texas A&M University)

30/07/2007, 16:30

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

We introduce a novel mechanism for baryogenesis, in which mixed anomalies between the hidden sector and $U(1)_{baryon}$ drive the baryon asymmetry. We demonstrate that this mechanism occurs quite naturally in intersecting- brane constructions of the Standard Model, and show that it solves some of the theoretical difficulties faced in matching baryogenesis to experimental bounds. We...

121. Extended Higgs Models and the Transition to Exact Susy

Louis Clavelli (University of Alabama)

30/07/2007, 16:50

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

String landscape ideas and the observation of a positive vacuum energy in the current universe suggest that there could be a future transition to an exactly supersymmetric world. Atomic and molecular binding in this susy background probably require that electroweak symmetry breaking survives the transition. Among several susy higgs models that have been discussed, one stands out in this...

137. Cycling in the Throat

Dr Ivonne Zavala (Durham University)

30/07/2007, 17:10

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

I will discuss the dynamics of a probe D3-brane propagating in a warped string compactification. I will focus in the exploration of the trajectories obtained from giving the brane angular momentum in the extra dimensions. I will show that, in general, angular momentum creates a centrifugal barrier, causing bouncing as well as cyclic cosmologies from a "mirage" point of view. I will also...

244. Very Light Cosmological Scalar Fields from a Tiny Cosmological Constant

Dr Xavier Calmet (Université Libre de Bruxelles)

30/07/2007, 17:30

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

We propose a new mechanism to generate the mass of a scalar field in an expanding universe. The mass of this field turns out to be generated by the cosmological constant and can be naturally small if protected by a conformal symmetry which is however broken in the gravitational sector. The mass is comparable today to the Hubble time. This scalar field could thus impact our universe today...

315. Signals of Supercritical String Theory at the LHC

Prof. Teruki Kamon (Texas A&M University)

30/07/2007, 17:50

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

Recently, it is shown that the modifications of the Boltzmann equation describing the evolution of relic abundances due to dilaton dissipative-source and non-critical-string terms change the cosmologically allowed parameter space of SUSY model. In this talk, we will investigate the allowed parameter space in the context of minimal SUGRA boundary condition at the LHC. We will...

366. Large Gravitational Waves in String-Inflation

Dr Axel Krause (Arnold Sommerfeld Center, LMU Muenchen)

30/07/2007, 18:10

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

The potential detection of gravitational waves from string inflation would provide essential complementary information to measurements of the scalar spectral index. E.g.~it can tell us directly the size of the inflationary potential. It is, however, clear that warped brane inflation (in case it can be tuned to give inflation) cannot lead to measurable gravitational waves. We will discuss...